Medium Aberration, Chaotic Evil
Armor Class 17 Natural unstable shape
Hit Points 27 (5d8 + 5)
Speed 70 ft., Swim 50 ft. To move, this creature needs to use a reaction.
STR
14 (+2)
DEX
16 (+3)
CON
12 (+1)
INT
3 (-4)
WIS
10 (+0)
CHA
6 (-2)
Damage Resistances Bludgeoning, Piercing, and Slashing from Mundane Attacks
Condition Immunities Prone
Senses Truesight 60 ft., Passive Perception 10
Languages None
Challenge 2 (450 XP)
Proficiency Bonus +2
Traits

Precarious Inertia.If left alone and not disturbed, interacted with or entered in direct contact, Chaos incarnate will nor use any action or reaction. It may/must use its features.

Living Instability. Once per turn, Chaos Incarnate can change its size to Large or Medium at will, whenever it wishes to do so.

Sudden Change. Any creature starting its turn within 5ft of Chaos incarnate must succeed a DC13 Dexterity saving throw or take 1d6+2 bludgeoning damage. If a creature is engulfed because of Living Instability, it must succeed a DC16 instead or take 2d6+4 bludgeoning damage. Failing the saving throw breaks Precarious Inertia.

Actions

Multiattack. Chaos Incarnate makes two pseudopod attacks.

Pseudopod. Melee Weapon Attack: +4 to hit, reach 5 ft., one creature. Hit: 17 (1d6+2) bludgeoning damage. If the target is Medium or smaller, it must succeed on a DC 10 Strength saving throw or be knocked prone.

Reactions

Shifting Form (Supercharged 5-6). Chaos Incarnate holds no stable shape, constantly deforming and transforming itself into incomprehensible shapes. If targeted by a melee or ranged attack, as a reaction, Chaos Incarnate may suddenly deform itself to move up to its speed. This movement does not trigger attacks of opportunity. Chaos Incarnate may use this reaction twice in a turn if it is Supercharged.

Description

INDESCRIBABLE SHAPE

Chaos Incarnate cannot be described accurately as a "creature", but more as an environmental anomaly of magical origin. Constantly shifting at a breakneck pace, Chaos Incarnate cannot be described accurately with words, but once people have encountered it, its existence leaves a mark on anyone who has experienced it. Extremely unstable and barely coherent self-sustaining magic, scholars are unsure of their origin. The more convincing hypothesis theorize that Chaos Incarnate is the result of a magical experiment gone wrong and coherently acting as a basic intelligence.

It is recommended to avoid interacting with Chaos Incarnate at all, otherwise it might become unstable and dangerous to the creatures around it. However, if triggering it is inevitable, it is recommended to use abilities that require Chaos Incarnate to resist magical powers, since it is extremely difficult hit it and the lack of momentum makes it unable to move. (A spell that requires a save is not considered a range attack for the purpose of the Shifting Form reaction.)

NOTE TO DMs:

CR is purely guessed, so I'm unsure of how deadly such a monster would be in an encounter.

The goal is also to make it possible for PCs to understand that this creature's movements do not work with typical rules, but as a reaction to attacks that have momentum. I also recommend to use movement reactions in a less coherent manner, sometimes moving it away from players when Supercharged for no tactical benefit, but to translate the utter chaos of the creature. If there is more than one Chaos Incarnate, you can also use this movement to create a chain reaction and break their Precarious Inertia.

If you want to make it move on its turn, the only way to do so would be to use its Living Instability feature to grow to Large, then shrink to Medium in a different square. This will take 2 turns to move towards a direction by 5 ft. Do not underestimate this, since changing from Medium to Large could trigger the Sudden Change trait and break its Precarious Inertia. Its ability to do this whenever it wishes to do so means it can also be used to force an attack to automatically miss if it shrinks out of reach immediately after a creature calls a melee attack on it.

Habitat: UnderdarkUrban

Iront_Mesdent

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