Especially Nasty – Murder Mollusk

I’ve dug up this beauty from the depths of cloud storage (or should it be heights?), a kaiju boss fight. I mostly share it now because of all the titles the creature has.

A monstrous slug five meters tall and twenty long, with scythe-like claws as long as a man, it crawled out of the sea and headed straight for the nearest city. Seagulls fell from the skies in its wake, burned by its foul miasma, trees wilted as it passed. All that stood between it and civilization was a group of plucky heroes manning a defensive wall and an arcane McGuffin Vibrational Disruptor they’d just rescued planted on top of it.

Murder Mollusk

Polyp of Pestilence, Sovereign of Slime, Ruler of Rot, Crustacean Czar, Tarnishing Tyrant

Huge 8th level wrecker [BEAST]

Initiative: +11

Murderous bite +16 vs AC – 75 damage, 30 acid damage and the mollusk grabs the target if it’s not already grabbing a creature.

Miss: 20 acid damage.

Scything claws +16 vs AC (2 attacks against nearby enemies) – 50 damage.

Natural even hit or miss: the target pops free of all enemies and is flung away.

Miasma: When a creature is engaged with the mollusk at the start of its turn, it takes acid damage equal to 9 times the escalation die.

Flesh of Chaos: Whenever the mollusk is hit by a natural odd number attack, it spawns a chaos glorp nearby. Whenever the mollusk is critically hit or staggered for the first time, it spawns a chaos beast nearby (both creatures are found in the Bestiary). If the attacker is engaged with the mollusk, the spawned creature immediately engages them.

Nastier Specials (duh):

Bejeweled mollusk: The mollusk has glowing stones embedded in its chitinous hide. When an enemy misses with an attack against the mollusk, that enemy chooses one: it takes 10 acid damage; OR one piece of its non-magical equipment (something useful, but player’s choice) melts. Adjust skill checks or stats accordingly.

Steaming body: The mollusk’s foul stench obscures the air around it. Ranged attacks against the mollusk take a -2 penalty, or a -4 penalty if the attacker is far away.

AC 24

PD 22    HP 420

MD 18

Everything Rots

If the Vibrational Disruptor is not operational at the start of the mollusk’s turn, decrease the escalation die by 1 and destroy one fortification or war machine.

Vibrational Disruptor

A sphere of concentric rings creating a teeth-shattering hum when they resonate. d6, d8, d12 and d20 symbolize the speeds at which they rotate. A character operating the machine can spend a quick action to activate it for the turn to roll all the dice. Another quick action can be used to adjust the settings and re-roll any of the dice. If at the end of a round any dice are common denominators of others (e.g. 4 and 8), everything in the fight takes those dice in damage. 1s don’t count.


Two ballistae are mounted on the wall. The character operating a ballista can use the following attack:

R: Anti-kaiju projectile +14 vs AC (one nearby or far away enemy) – 50 damage.

Limited use: the ballista must be reloaded between shots, which takes a standard action. Another character can do this.

If you have uncanny memory for monster abilities, you’ll be able to recognize a remorhaz deep within the slimy exterior of the Murder Mollusk. I’ve used it as a foundation before adding abilities to make it more of a boss monster. From what I recall, it showed up some distance away, giving the party a couple of rounds to shoot at it. There most likely was a sahuagin herald running ahead, whose main purpose was to announce all the titles of its god. And, despite being 4 levels below it, a defensive ability and other threats present on the battlefield, the party murdered the Murder Mollusk in about 3 rounds.

At the time, it prompted the post on boss decay, an abstract and slight of hand way of preventing abrupt death of our beloved bosses. In retrospect, I really shouldn’t have been surprised. 13th Age doesn’t have Solo monsters of D&D 4e, which were meant to stand up to a party of 5 on their own. They most often couldn’t due to action economy among other things, but at least the concept was there. At most, 13th Age has triple-strength (or Huge) monsters, which, unsurprisingly, pose a threat to at most 3 characters.

The implication is clear enough: don’t have a sole boss monster, add underlings of some sort to spice up the fight. And I did! But players can prioritize, save up their most powerful abilities for the boss, and squash it like a slug. Which isn’t exactly a problem, they feel like big damn heroes. But, y’know, I’d like my monstrosity to feel like a big damn threat before it dies. Not to mention the quick fight making the McGuffin we’d spent several sessions restoring almost meaningless.

Here, then, are a few alternative ideas to prolonging the average lifetime of a boss.

Shielding Minions

The boss gains resist all damage X, where X is twice the number of its mooks present on the battlefield. Start the fight with 10 mooks, and/or add a few every round or on some trigger, whatever suits the situation. Give the PCs a reason to not just nuke the boss.

Vulnerable While Charging Up

While the escalation die isn’t even, the boss’ defenses increase by 3. While it is even, they decrease by 2 instead. Of course, it makes a nasty attack while the escalation die is even. For bonus points, present an opportunity for PCs to hide from this attack instead of hitting the vulnerable boss. Tactical choices! And don’t forget to add other enemies to the fight so PCs have something to do while waiting for the boss to open up again.

Truly Enormous

An old idea of mine (I’m sure others have thought of something similar too), breaking up the gigantic enemy into several sub-creatures that have their own hit points, do their own attacks or grant it traits. A fight against such a boss is likely to be much more brutal: instead of the abstraction of damage, you’re chopping off its limbs. This is a much more involved approach as it likely requires designing everything from scratch. Guess writing up one such enormous boss monster will be my next project.

Especially Nasty – Aboleth

Twelve ages have come and gone. Kings and queens have risen and fallen. Archmages and archfiends have ascended and been cast down. Everything changes. Everything but aboleths. In the murky waters of history, they dwell. Better than any other creature, they understand the ebb and flow of power. They feel the currents which bring past into the future. Once the aboleths are satisfied nothing can surprise them, they will emerge from the depths, as inevitable as time itself.

If there’s one weakness aboleths have, it’s their aquatic nature. If forced to crawl on land, an aboleth moves slowly, a literal fish out of water.

Ancient Aboleth

We are but footnotes in the memory archives of aboleths.

Huge level 10 spoiler [ABERRANT]

Initiative +10

Drown in memories +15 vs MD (up to three nearby or far away enemies) – 30 damage, and roll a 1d3 once:

1: Fall of the heroes – If the target has at least one relationship with a heroic Icon, it takes 50 ongoing damage.

2: Tragedy of the undecided – If the target has at least one relationship with an ambiguous Icon, it becomes stunned.

3: Treachery of the villains – If the target has at least one relationship with a villainous Icon, it becomes confused.

The targets are flooded with visions of past Icons’ doom, with them in place of the Icons. The aboleth chooses the targets that will be most affected by the specific attack. The condition ends on an easy save if the target has one Icon relationship of the corresponding type, on a regular save if it has two, and on a hard save if it has three or more. The player can describe the scene from the ages past that their character is seeing in order to get a +5 bonus to their save roll. These scenes cannot repeat.

Slimy tentacles +15 vs PD (2 attacks against different enemies) – the target starts making last gasp saves as the aboleth slime seeps into their skin, turning it transparent. On fourth failure the target falls unconscious, and later becomes the aboleth’s slave, unable to survive long outside the water. If the target is already making last gasp saves when it is hit by this attack, it fails one immediately.

Special: aboleth can use slimy tentacles as a quick action 1/round.

Special: if using the corruption rules, a character has to risk corruption in order to make a last gasp save – they fail it automatically otherwise. An ally can still help them to try and shake it off as usual, but they risk corruption instead unless they find a way not to touch the slime as they clean it off. 

Nastier specials:

Elemental mount: the aboleth is suspended in a sphere of murky water, technically a lobotomized quazi-elemental, which enables it to move over land. It gains +2 to all defenses against creatures outside the sphere. Creatures inside the sphere are engaged with the aboleth, and take a -2 penalty to last gasp saves against the aboleth slime.

AC 24

PD 20    HP 648

MD 25

Petrified Aboleth

The stone idol worshipped by the horrid creatures of the desert hides a dark secret. Trapped by a retreating sea, the aboleth within passes the time until its return submerged in memories.

Large level 4 spoiler [ABERRANT]

Initiative +4

Drown in memories +9 vs MD (one nearby or far away enemy, or three enemies when aboleth is staggered) – 8 damage, and roll a 1d3 once:

1: Fall of the heroes – If the target has at least one relationship with a heroic Icon, it takes 15 ongoing damage.

2: Tragedy of the undecided – If the target has at least one relationship with an ambiguous Icon, it becomes stunned.

3: Treachery of the villains – If the target has at least one relationship with a villainous Icon, it becomes confused.

The target is flooded with visions of a past Icon’s doom, with them in place of the Icon. The aboleth chooses the target that will be most affected by the specific attack. The condition ends on an easy save if the target has one Icon relationship of the corresponding type, on a regular save if it has two, and on a hard save if it has three or more. The player can describe the scene from the ages past that their character is seeing in order to get a +5 bonus to their save roll. These scenes cannot repeat.

Stone shell: the aboleth is encased in a protective shell of petrified slime. It is immobile and has resist non-psychic damage 13+ (non-psychic attacks that roll less than a natural 13 deal only half damage). When the aboleth becomes staggered, its shell cracks: it loses damage resistance, can move, and takes 10 ongoing damage. The ongoing damage ends only when the aboleth ends its turn submerged in water.

AC 20

PD 16    HP 150

MD 17

Especially Nasty – Intellect Devourer Delusion

This creature uses the curse rules as a foundation, taking them in a slightly different direction. There’s no moral lesson to this “curse”, just the unremitting terror of having your mind eroded, bite by bite. This is how intellect devourers are born.

In addition, there are a few elements which use the corruption rules. Simply ignore any mentions of corruption if you’re not using that subsystem.

Intellect Devourer Delusion

Transgression: You’ve really annoyed someone really unpleasant. Alternatively, this could be the side effect of severe corruption.

Associated Icons: Archmage, Lich King, Prince of Shadows, The Three, some horrorific fallen or rising icon.

When the curse strikes: All throughout the session, you feel like you’re being watched. As Germination (see below) rises, you’ll start hearing a voice, nonsensical at first, then issuing instructions or insults. At the beginning of combat during this session, you become aware of an intellect devourer hiding somewhere on the battlefield. It’ll keep reappearing this session until either Germination or Comprehension is increased.

Some Assembly Required

The nascent intellect devourer always matches the capabilities of its host. Find the “base stats for normal monsters” on page 254 of the core book and use them to replace all the ‘x’s in the write-up below. The intellect devourer’s level is equal to the level of the host, MD is its better defense, and Initiative is equal to its level +4. See below for the way the effective hp are calculated. If you’re feeling fancy, you may wish to further customize these numbers to better suit the infected PC. Take a look at the previous page for simple adjustments. For instance, if the host is a healer, you could make its intellect devourer a scrapper (+3 to attack, 70% of normal hp); or if the host is a “glass cannon”, the intellect devourer could be an oaf (-3 to attacks, +3 to AC).

Delusion Progress

There are two parameters that track the progress of the intellect devourer growing inside the poor host’s head: Comprehension and Germination, both starting at 1. Comprehension is a measure of success the host has in understanding and ultimately overcoming the intellect devourer. It goes up by 1 each time the character defeats the intellect devourer. Germination, on the other hand, measures how close the intellect devourer is to completely overtaking the host’s personality, growing legs, and attaining freedom. Germination goes up by 1 each time the intellect devourer knocks out the host with psychic damage at the end of the fight.

Comprehension affects the intellect devourer’s total hp: it has 50% of the hp it’s supposed to have according to the table when Comprehension is 1, 75% when Comprehension is 2, and 100% when Comprehension is 3. This may seem counterintuitive: the better the host understands the threat, the harder it is to vanquish. However, while their comprehension is 1 or 2, they cannot truly defeat it: it slinks away back into the recesses of their mind. Once Comprehension reaches 4, the intellect devourer is actually destroyed.

Germination makes it easier for the intellect devourer to use its abilities. In addition, whenever Germination goes up, have the player choose a background their character has. Now it belongs to the intellect devourer. But it’s fine, it’s willing to share. Every time the character uses the stolen background, they risk corruption, and the memories they draw upon are dissociated from their own point of view. Describe a mundance scene relating to the background, as observed by an alien intellect.

Due to the way the intellect devourer’s psychic damage is applied (see below), both Germination and Comprehension can go up simultaneously. Should both reach 4, the host is left in an unenviable position of being in total control of an intellect devourer that has hijacked their former body.

Nascent Intellect Devourer

“You are worthless. Just give up. Let me out. I’ll take care of everything.”

Initiative level +4

Host’s level spoiler [ABERRATION]

[Special trigger] C: Anxiety +x vs MD – the host rolls damage as if they’d hit themselves with the attack they used, dealing psychic damage.

Limited use: Use as an interrupt when the host attacks and an opportunity presents itself.

[Special trigger] C: Delusion + x vs MD – the condition against which the save was made is applied again, even if the save wasn’t successful, except any damage it deals is psychic. It’s not considered to be the same effect, though, e.g. if a creature gains a bonus to attacking those suffering ongoing fire damage, ongoing psychic damage of thinking you’re on fire won’t help it.

Limited use: Use as an interrupt when the host makes a save and an opportunity presents itself.

[Special trigger] C: Paranoia +x vs MD – the ally rolls damage as if they’d hit the host as well, dealing psychic damage.

Limited use: Use as an interrupt when the host’s ally attacks an enemy nearby the host, and an opportunity presents itself.

C: Your lying eyes (nearby host) + x vs MD – x psychic damage, and the intellect devourer teleports to a nearby location.

Limited use: Use only when the intellect devourer hadn’t used any interrupts abilities since the end of its previous turn.

Opportunist: Several of the intellect devourer’s abilities can be used “when an opportunity presents itself” while some specified action occurs. With Germination 1, the ability can be used when the action resulted in failure and the natural roll was odd. With Germination 2, the ability can be used when the natural roll was odd, no matter action’s success. Finally, with Germination 3 the ability can be used when the natural roll was odd and on any roll when the action resulted in failure. The host can risk corruption to deny the intellect devourer an opportunity.

Mind playing tricks: Only the character suffering from the delusion can see or in any way interact with the intellect devourer. It’s all in their head. Quite literally: they’re not being stalked by a montser, the monster is growing inside their brain.

Identity crisis: Keep track of the damage dealt by the intellect devourer separately – do not subtract it from your hit point total. You can’t heal it either. Instead, the damage applies all at once at the end of the fight.


This is as horrific as a monster gets. A parasite stealing one’s mind, a memory at a time. A disembodied voice critizicing every decision they make. An alien thing they share their head with. It is an opportunity for the GM to pull out all the stops, especially in the sessions when the “curse” strikes. Don’t let the few ideas mentioned so far limit you. Get under your player’s skin, inside their skull, and wriggle those growing legs. At the same time…

A word of caution

As you can see, the intellect devourer delusion is not just a nasty critter, but a not-so-subtle metaphor for mental illness. For some players, it may simply be a challenge to overcome. For others, it could potentially be catarthic to squash the embodiment of the horrible voice inside their head. Others still could be using games to escape similar real-world troubles. Just… be mindful.

Depending on your players, it may be a good idea to reframe the intellect devourer’s influence as insidiously helpful instead of anxiety-inducing. In that case, it wants to be your friend, a better friend than any of the fake friends you have. Anxiety becomes Earnest concern: “Oh no,” it says, “Look how clumsy you are. That’s ok, let me help.”

Curses in 13th Age

Sometimes, characters do something they know they shouldn’t, as they let their greed or boneheadedness get the better of them. Cursing them is a traditional punishment. Here you’ll find a rules variant for doing just that, advice on making up your own curses as well as a few examples which range from silly to deadly.

A fair-y curse

Generally speaking, the PCs should know what they’re doing is wrong, or at least dangerous. It’s not a punishment if it’s unexpected, that’s just you being mean. Stealing magic items from a burial mound is worthy of a curse. So is being rude to a witch. Or an Icon, for that matter. A lot of curses come from fairy tales, and those typically carry some moral lesson.

There’s an important distinction to be made, though: this moral lesson is meant for the characters, not the players. To put it another way, you shouldn’t punish the players for “playing wrong”, punish characters for doing wrong instead. These curses are not a tool for a GM to passive-aggressively correct players’ behavior, they’re meant to make the characters’ lives more interesting.

Iconic interference

Curses hijack the icon relationships characters have, as they fundamentally come from the same source: Icons. Hopefully, you didn’t actually get cursed by an Icon, but the person, spirit, or tradition you wronged had ties to one nonetheless. This immediately poses an interesting question: what sort of behavior would a particular Icon dislike so much their followers could curse you? That which sufficiently annoys the Archmage, the Orc Lord would find amusing.

It doesn’t have to be personally offensive to the Icon, either. You could have a positive relationship with the Elf Queen, but the hag that cursed you is her grand niece, thrice removed. Finally, it doesn’t even have to be a current Icon. Whether fallen or rising, there are stranger quasi-Icons in the world than the thirteen we know. The Gold King and the Forest that Walks are detailed in Bestiary 2, and you of course could invent more. In fact, you could count overcoming a curse as a campaign success against them.

Curses 101

The cursed character gains a special relationship with the Icon that caused their curse, if they don’t have one already. They roll it at the start of every session as they would a regular one, though it grants them no usual benefits. From then on, whenever they roll a 1 or 2 for their cursed relationship, whether they had one before or not, their curse strikes: some time during the session, the GM should conspire to inflict its specific downside on the character. The GM can optionally do the same as the drawback of rolling a 5 on a pre-existing relationship.

This downside is unique to each curse. It shouldn’t be something that removes a character from play, instead making their life interestingly unpleasant for the duration. Some curses offer the cursed character an opportunity to succeed at some task despite the complications it presents, others merely require persevering through it. Each such success helps the character take a step towards overcoming the curse, either providing them with a piece of information they need, or weakening the curse directly. The third success (or simple survival) is enough to break the curse.

Six hexes

Curse of Transformation

Transgression: You’ve needlessly harmed an animal that was dear to an Icon’s servant, or that served an Icon itself.

Associated Icons: High Druid, Priestess, Elf Queen.

When the curse strikes: you transform into a defenseless critter yourself. A frog is somewhat traditional, though a rat works just as well. Your clothing and maybe even your empty skin fall to the ground. Generally speaking, this shouldn’t cause your character to miss fights, instead causing them grief when they try to do something important, or turning an everyday action into something highly inconvenient. The transformation lasts for a scene.

Curse of Restlessness

Transgression: You’ve robbed a tomb.

Associated Icons: Lich King, Dwarf King.

When the curse strikes: Ghosts of the dead you disturbed torment your nights, demanding you perform a service for them, something you can do this session. This may involve avenging a wrong done to them, fulfilling a task they left unfinished, or helping out their still living relative. Until you do, you only regain 4 recoveries whenever you have full heal-up.

Curse of Misfortune

Transgression: You mocked an Icon servant’s poor luck.

Associated Icons: Prince of Shadows, Elf Queen, Diabolist.

When the curse strikes: For the entire session, humiliating coincidences follow you: whenever you roll an odd number on a d20, something minor yet unpleasant happens. Drinks get spilled on you in a tavern, the pit you fall into had been used as a latrine by the dungeon’s denizens, your pants split as you swing your sword, etc..

Curse of Charity

Transgression: You refused to offer help when it was needed.

Associated Icons: Priestess, Great Gold Wurm.

When the curse strikes: This curse is special, in that its effects increase each time it strikes, and don’t go away until it’s done with you. The curse of charity is kinda-sorta a magic item, or at least it counts against the number of magic items you can attune to without them overwhelming you. It starts at one such “slot”, and increases the number by one each time it strikes. The “quirk” it imparts is, unsurprisingly, heedless charity – the character may go as far as giving away their hard-won magic items to those who may need them. While they don’t have to do so, it’s a good way to get back under the limit of magic items they can handle.

It takes three acts of genuine charity to break this curse. These include donating magic items, as well as other significant sacrifices. Giving the items you can no longer use to party members doesn’t count, though.

Curse of Cowardice

Transgression: You fled from battle with the servants of an Icon. This curse could be the campaign loss you incur, affecting the one who convinced everyone to flee.

Associated Icons: Orc Lord, Crusader.

When the curse strikes: For one fight during the session, all enemies gain fear aura (see p200 of the core book) that only affects you. You make progress towards overcoming the curse only if you display bravery during the fight, which is left up to the GM to determine – this may be standing and fighting despite the fear penalties, but could involve some other act of heroism as well.

Curse of the Labyrinth

Transgression: You’ve stolen from an Icon’s servant.

Associated Icons: Archmage, Emperor, Golden King, The Three.

When the curse strikes: At the start of one fight during the session, walls rise up that only you can see, separating you from everyone else. To others, it looks like you’re needlessly zigzagging through the battlefield, avoiding the opposition. To escape this illusory labyrinth, you have to get to the other side of the battlefield. Once you do, the illusion fades.

You can’t see or engage any enemies, as you perceive labyrinthine walls between you, so you have to move around them. They can, however, attack or engage you, seemingly leaping through false walls or acting as triggered traps. The curse makes any enemy that engages you look like a minotaur. In addition, such enemies gain the following trait:

Lost in the maze: Whenever the cursed target disengages from the “minotaur”, it loses the sense of direction – or, as it’s all an illusion, the exit shifts. The GM secretly rolls a d4 to determine on which side of the battlefiled the new exit is located. It takes a move action and a hard skill check to learn where to go. Alternatively, the cursed character can try their luck and pick a direction.

If the battle ends while you’re still trapped in the maze, it fades away. However, this doesn’t count as progressing towards dealing with the curse.

Go forth and curse

As you can see, the mechanical framework is very simple, yet allows for a great variety of curses. Much like the Icon relationships they parasitize on, curses are what you make them to be. And if you do make up your own, feel free to post them in the comments!

Especially Nasty – Infested Water Elementals

There are plenty of scary things that dwell in seas, rivers, and lakes. Thankfully, all you have to do to avoid them is not go into the water. But what if water comes to you?

Piranha-infested Water Elemental

“Lay the plank over the pond, so they think they can safely cross it, as long as they don’t fall in,” the orc giggled. 

3rd level large spoiler

Initiative +3

C: Ebb and flow +8 vs PD (up to 2 attacks, each against a different nearby enemy) – 9 damage.

Natural even hit: The target pops free from other creatures and moves to engage the infested water elemental.

Piranha swarm +8 vs AC (all creatures engulfed by the infested water elemental) – 20 damage.

Miss: Half damage.

Limited use: 1/round as a quick action.

Rip current: Any creature that ends its turn engaged with the infested water elemental is engulfed (functions like a grab).

Nastier specials:

R: Projectile piranhas +8 vs AC (1d3 nearby enemies) – 7 damage.

Limited use: 1/round as a quick action, if there is no creature engulfed by the elemental.

AC 18

PD 16     HP 99

MD 13

Shark-infested Water Elemental

A shark-infested air elemental, colloquially known as “Sharknado”, if such a thing existed, is a one-way shark-delivery method. This elemental, however, acts as an adventurer-delivery method. Generally one-way, too. 

5th level huge spoiler

Initiative +5

C: Ebb and flow +10 vs PD (up to 3 attacks, each against a different nearby enemy) – 17 damage.

Natural even hit: The target pops free from other creatures and moves to engage the infested water elemental.

Rip current: Any creature that ends its turn engaged with the infested water elemental is engulfed (functions like a grab).

Infestation: The shark-infested water elemental starts with 3-4 sharks infesting it. Include them as separate monsters when building this battle, though note they are weaklings and so count as half a normal monster.

Nastier specials:

Shark arms +10 vs AC (one attack per shark infesting the elemental) – 12 damage.

Miss: 1d6 damage.

Limited use: 1/round as a quick action, if there is no creature engulfed by the elemental.

Infinite sharks: At the start of each round, roll a d6. If the result is greater than the number of sharks infesting the elemental, and less or equal than the escalation die, another shark appears inside the water elemental. Where does it come from? Is there a portal to a Shark Kingdom within the elemental’s heart? Could something else come through? Could you go through it instead?

AC 20

PD 18     HP 237

MD 15

Shark Infesting Water Elemental

It seems quite happy with its living situation. At the very least, it’s smiling. 

5th level weakling troop

Initiative +9

Massive jaws +10 vs AC – 12 damage.

Miss: 1d6 damage.

Shredder: When an engulfed enemy misses with a melee attack against a shark or an elemental it infests and rolls a natural 1–5, the attacker takes 2d6 damage. This happens only once, even if there are multiple sharks infesting the same elemental.

Blood in the water: The shark goes into a frenzy if there’s a staggered enemy engulfed by the elemental it is infesting, and deals extra d6 damage, hit or miss.

Symbiotic relationship: The shark gains +5 to all defenses against attacks made by enemies that are not engulfed by the elemental it infests. However, once the elemental dies the shark becomes semi-hazardous terrain at best.

AC 21

PD 19     HP 36

MD 15

Especially Nasty – Illiphant

Illithids are plotting, secretive, inscrutable, psychically potent yet physically frail creatures. They are also “product identity” of D&D, so no official version exists in 13th Age. Fortunately, an illiphant is none of these things. It owes its existence to a mural made by Alexis Diaz, though the artist can hardly be blamed for the name, or the ensuing silliness.


Whether an illithid experiment or the result of escaped illithid tadpoles latching on to a poor creature, this monstrosity is highly territorial, exceptionally intelligent, and holds a grudge. If bodies of massive creatures with enormous holes in their skulls littered throughout the area were not enough to deter you, you better hope you merely get trampled to death. Illiphants do so like the taste of terror mixed with despair. 

Level 7 Huge wrecker [ABERRANT]

Initiative +9

Trample +11 vs PD, 42 damage.

Natural even attack roll: the target may choose to pop free. If it does, the illiphant moves to a nearby enemy it hasn’t attacked this turn yet and repeats the attack. If the target chooses not to pop free, the illiphant repeats the attack against it instead.

Natural odd roll: the illiphant makes a tentacle grab attack against the same target as a free action.

Tentacle grab +11 vs PD, the target is grabbed. An illiphant can have up to four creatures grabbed. This is the ability it usually uses for oppoprtunity attacks.

Squeeze the brains out +13 vs PD (all creatures grabbed by the illiphant), 84 damage.

Nastier Specials:

Cacophanous trumpetting. The illiphant has fear aura (fear threshold 36hp). In addition, its tentacle grab attack can target either MD or PD, whichever is lower.

An illiphant is never forgotten. The creature that strikes the killing blow against an illiphant never truly escapes the encounter. Their wounds may heal, but fear lingers. The (hopefully) irrational fear of being followed by an illiphant bent on revenge. Of its massive bulk hiding in the shadows. Observing. Biding its time. Bringing about their inevitable downfall. A hulking gray eminence out to get them.

Clearly, the only way to rid yourself of this fear is to confront it. Hunt down and kill the illiphant hunting you. Or at least any illiphant you can find. Just be sure it’s you who lands the killing blow again, or the paranoia will spread.

AC 24

PD 21    HP 324

MD 19

Especially Nasty – Raggamummy

It shambles towards you, more pitiful than menacing. The stench of rotting flesh is barely contained by its dirty bandages. It is not a very impressive mummy. As you notice the bandages sway in the non-existent wind, you realise, way too late, it is not a mummy at all.


Without a creature to wrap around, the raggamummy is just a pile of animated bandages. Everything changes when it finds a victim – the bandages snake over them, wrapping tighter and tighter.

Level 2 spoiler

Initiative +2

C Entangle (one nearby non-mummified creature) +7 vs PD, 7 damage and the target is hampered and mummified.

Mummification. The mummified creature suffers 5 ongoing damage for as long as it remains mummified, and starts making last gasp saves, except it retains its full set of actions – see below. Success allows the mummified creature to throw the raggamummy off. On the fourth failed save, the raggamummy reaches inside the creature’s head, pulling out its brain through its nose. Some of the bandages coil up inside the now empty head, and the raggamummy takes full control of the body. Treat it as permanently hampered pseudo-undead.

While the raggamummy has a creature mummified, it doesn’t act on its turn. Instead, it controls the mummified creature’s actions.

Natural even save: the mummified creature has control over its standard action this round.

Natural odd save: the mummified creature has control over its move action this round.

Only the regular last gasp saves can trigger these effects, saves granted by other creatures or abilities do not.

Close to the skin. While the raggamummy has a creature mummified, it takes only half damage from any source, with the mummified creature taking the other half. It takes full damage from fire instead (the mummified creature still takes half).

Nastier Specials

Death by a thousand papercuts. The more you struggle, the deeper the bandages cut. The mummified creature’s ongoing damage increases by 5 each time it makes a last gasp save. It can voluntarily fail last gasp saves without making a roll.

AC 18

PD 12      HP 30

MD 16

The raggamummy starts the encounter as a “mummy”, wrapped around a corpse – use zombie shuffler stats (level 1 mook, 13A p251). Whenever a creature hits this “mummy” with a melee attack, the raggamummy makes an entangle attack against it. If successful, it leaves the body which drops dead.

Terrain Effects in 13th Age

13th Age doesn’t much care for terrain or environmental effects. There’s the Tracker and Swashbucker talents, and a bit on using traps in the core book. The GM Resource book has a solid chapter on using terrain and overcoming the stand-and-hit-each-other problem. Good advice, but no mechanics. So, here are some mechanics. This post is a toolbox more than anything, providing you with a starting point to create the terrain effects that match your situation.

The idea is directly inspired by D&D 5e’s lair actions. But whereas the lair actions are tied to boss monsters controlling their environment, terrain effects are tied to Icons, can appear anywhere, and can be taken over (or even created!) by PCs.

Adding Terrain Effects to Combat

The simplest way to add a terrain effect is to have it be there from the start. A terrain effect is roughly equivalent to a single-strength creature of its level. If the opposition owns it (see below), simply include that in your battle building calculations. If it is neutral, but starts out under the opposition’s control, it’s still worth something. Neutral active terrain effects make life harder for everyone and probably don’t affect the calculations.

There is, however, another option. Players can use one of their 6’s or 5’s on the icon relationship dice to create or conveniently discover a terrain effect. 13th Age is a high magic game, with Icons affecting the world itself with their will. That said, it’s entirely up to your GM (and the group) how often this would happen. The effect, as well as the locaiton, should fit thematically – utilising your relationship with the Lich King at a graveyard to cause zombie arms to pop up from below the ground and grasp at your enemies is cool. Calling on the same zombies to grab your enemies in a royal palace is a bit odd.

A 6 on a relationship die gives you ownership of the terrain effect. It can also give you ownership over a neutral terrain effect already present on the battlefield. A 5 provides a neutral terrain effect.

What does owning a terrain effect mean? Whoever owns the terrain effect chooses who counts as its enemies, simple as that. Neutral terrain hates everyone equally.

Mechanics of Terrain Effects

Terrain effects use the numbers from the Skill Check DCs, Trap/Obstacle Attacks & Impromptu Damage by Environment table on the page 186 of the core book. Depending on how far along in a tier your party is, use the Normal or Hard line. Handwavy, I know, but the convenience of using a single table from the core book beats individual write-ups.

Whenever monsters are forced to do skill checks, they roll a save instead: easy save replaces a normal check, normal save replaces a hard check, and a hard save replaces the ridiculously hard check.

Each terrain effect listed below is abstract, but comes with a number of examples. Modify the effect based on its flavor – change the damage type, the condition it inflicts, the defense it targets, or the skill it requires.


This is another things 13th Age doesn’t normally have. There’s two approaches here: if the terrain has a clear boundary, like ice-covered river, that’s the zone. Otherwise, if it originates from a single point, whether that point actually exists (unholy idol) or doesn’t (cloud of gas), the zone of effect is everything nearby this point.

Whenever a creature is on the edge of a terrain effect zone, a PC engaged with it can use a quick action to make whatever skill check they can get away with, to conclusively move their target into or out of the zone. Likewise, if a PC is on the edge of a terrain effect zone, a creature engaged with them can use a quick action to cause the PC to make a skill check or end up in or out of the zone.

Active terrain

Active terrain is almost a creature in its own right. It acts on its own initiative – give it an initiative modifier as you see fit, much like you would with a custom monster. No need to overthink this, +0 is generally fine.

Painful terrain

Attacks PD of 1d3 random enemies within it, dealing damage.

Examples: lava eruptions (The Three, High Druid, Diabolist, Orc Lord), steam vents (Crusader, Dwarf King, Archmage, Emperor), statue of an angry god (Crusader, Diabolist, Priestess, Lich King), snake pit (High Druid, Prince of Shadows, The Three).

Mobile “terrain”

Moves in a predetermined fashion, attacking PD of everyone it encounters along its path, dealing damage.

Examples: rolling boulder (Orc Lord, Dwarf King), boulder perpetually rolling down a Penrose staircase (Archmage), swinging axe (Dwarf King, Crusader).

Grasping terrain

Attacks PD of 1d3 random enemies within it, those hit become stuck, save ends. If the target is already stuck, the terrain deals damage instead.

Examples: strangling vines (High Druid, Elf Queen), zombie hands (Lich King), sinkhole (Dwarf King).

Passive terrain

Passive terrain affects enemies entering, ending their turn, or trying to do something within it.

Polluted “terrain”

Whenever an enemy ends their turn within this terrain, it attacks their PD. Those hit take damage, or become weakened or confused until the end of their next turn, depending on the polutant.

Examples: aerial poison (The Three, Prince of Shadows, Lich King), room on fire (The Three, Diabolist, Orc Lord, Great Gold Wyrm), spore cloud (High Druid, Elf Queen).

Unstable terrain

Whenever an enemy tries to move within this terrain, it must make a Dex skill check or lose the action.

Examples: patch of ice (High Druid), waist-deep swamp (The Three), tar (Orc Lord).

Dangerous terrain

Enemies are vulnerable while within this terrain.

Examples: blood-soaked fields (Orc Lord, Crusader), sacrificial altar (Lich King, Diabolist).

Protecting terrain

Whenever a non-enemy starts their turn within this terrain, it can make a save against a condition affecting it.

Examples: sanctified ground (Priestess, Great Gold Wyrm), inspiring statue (Emperor, Elf Queen, Dwarf King).

This is obviously not an exhaustive list, and I’d love to see your suggestions on expanding it.

Especially Nasty – Rust Monster Eraser

Rust monsters are not that dangerous, really. Annoying, potentially very expensive to deal with, and often leaving you terminally unprepared for whatever comes next, sure. But not dangerous by themselves. Some eat metal. Others magic. Not this one, though. This one eats your destiny. You’ll survive the encounter, covered in the rusty flakes of your once-great future.

Fatum phages show up at the most unfortunate time. The closer a hero is to fulfilling their destiny, the brighter they shine in the multi-faceted eyes of these beasts. And if said hero’s One Unique Thing has something to do with prophecy or fate, fatum phages would stop at nothing to get them.

Fatum Phage

Level 8 spoiler [ABERRATION]

Initiative +8

Caustic bite +13 vs. MD (one creature with no unspent story-guide icon relationship rolls)—38 damage, and 10 ongoing acid damage

Natural 16+: the target makes a save or permanently loses one of its icon relationships.

Rusting antenna +13 vs. MD (one creature with an unspent story-guide icon relationship roll of 5 or 6)—22 damage, and the target makes a hard save or decrements one of its story-guide icon relationship dice from 6 to 5, or loses a 5 entirely.

Tasty Tasty Fate: A fatum phage can add the escalation die to its attacks whenever it targets a creature that added the escalation die to its attacks last turn.

Rust’s targets: Icon relationships of creatures with 180 hp or more are not affected by the fatum phage’s ability to weaken or destroy them (they still take damage).

Nastier specials:

Rusted Icons: Pull up the Couatl entry of the Bestiary. Each time a fatum phage affects a relationship roll result or the relationship itself with its rusting antenna or caustic bite attack, it gains a corresponding icon-centric ability as if it was an 8th-level couatl. The fatum phage can only have one such ability at a time, so a new ability overwrites the old one; but limits on ability use such as 1/battle are reset when a new ability is gained.

AC 24

PD 18       HP 144

MD 22

Recovering Icon Relationships

The Archmage probably knows a useful ritual. So may the Elf Queen. The Diabolist likely has a deal she can offer. The Prince of Shadows stole everything there was to steal, maybe he knows how to unsteal some things, too. Point is, many icons can help. But why would they waste their time on someone so clearly insignificant as you?

Especially Nasty – Trollflesh Golem

Flesh golems are stitched together from the bodies of many different creatures. They are disturbing in their own right, but what if it wasn’t made up of just any old dead creatures? What if the parts weren’t dead at all?

Trollflesh Golem

Huge 4th level wrecker

Initiative: +7

Sweeping claws +9 vs AC (2 attacks) – 21 damage

Patchwork regeneration 15: While a trollflesh golem is damaged, it heals 15 hit points at the start of the golem’s turn.

When the golem is hit by an attack that deals fire or acid damage, or suffers a critical hit, its regeneration is permanently reduced by 5 as stitches come undone and a large chunk of its body falls off. It grows rapidly if haphazardly, becoming a spasming trollflesh – roll initiative as it joins the fight.

Dropping a trollflesh golem to 0 hp doesn’t kill it.

Ignore this ability once the trollflesh golem’s patchwork regeneration is reduced to 0.

Stitched together: a trollflesh golem is vulnerable to weapon attacks.

Energy magnet: Whenever a spell that causes cold, fire, force, lightning, or negative energy damage targets one of the flesh golem’s nearby allies, the trollflesh golem has a 50% chance of becoming the main target instead. Therefore, spells that affect groups would spread out from the trollflesh golem.

Weakness of the flesh: Unlike other golems, troll flesh golems are not immune to effects and can be affected by the fears and madness of mortals.

AC 18

PD 17      HP 150

MD 13

Nastier specials:

Something had to keep the trolls from regenerating all this time. You’re about to find out what it was.

Exposed necrotic core: Whenever a creature engaged with a trollflesh golem makes a natural odd hit or miss against it, the attacker suffers necrotic damage equal to 15 minus the golem’s regeneration.

Spasming Trollflesh

It’s a jumble of claws and muscle trying desperately to regrow, but it’s forgotten what it used to be. It doesn’t even have a head. Unfortunately, attacking everything around it seems to be in muscle memory.

4th level wrecker

Initiative: +8

Frantic Spasms +9 vs AC – 7 damage.

Natural even hit or miss: The spasming trollflesh pops free, moves to a random nearby creature and repeats the attack against it.

Maddened regeneration: spasming trollflesh heals to full health at the start of its turn. Reducing it to 0 hp kills it. When the trollflesh is hit by an attack that deals fire or acid damage, it can’t regenerate during its next turn.

AC 18

PD 17       HP 28

MD 13