monster

Cosmic Horror

CR 18

Gargantuan Aberration, Neutral Evil

Reveal Stat Block

Armor Class

15 (natural armor)

Hit Points

280 (16d20 + 112)

Speed

50 ft., fly 100 ft.

str

dex

con

int

wis

cha

Traits

Legendary Resistance (3/Day).If the horror fails a saving throw, it can choose to succeed instead.

Unusual Nature.The horror doesn't require air.

Actions

Multiattack.The horror makes one Bite attack and two Tentacle attacks.

Bite.mw 14 to hit, reach 10 ft., one target. ({@damage 4d6 + 8) piercing damage.

Tentacle.mw 14 to hit, reach 30 ft., one target. ({@damage 3d6 + 8) force damage, and if the target is a creature, it is grappled (escape 18). Until this grapple ends, the horror can't use this tentacle against other targets. The horror has 1d8 + 1 tentacles, each of which can grapple one target.

Psychic Whispers 5.The horror emits dreadful whispers in a 60-foot-radius sphere centered on itself. Each creature in the sphere that isn't an Aberration must make a 21 Wisdom saving throw, taking 33 (6d10) psychic damage on a failed save, or half as much damage on a successful one.

Legendary Actions.The creature can take 3 legendary actions...

Crushing Tentacle.The horror crushes one creature it is grappling. The grappled creature must make a 22 Constitution saving throw, taking 18 (3d6 + 8) force damage on a failed save, or half as much damage on a successful one.

Poison Jet (Costs 2 Actions).Foul gas squirts from the horror in a 30-foot line that is 5 feet wide. Each creature in the line must succeed on a 21 Constitution saving throw or take 14 (4d6) poison damage.

Teleport (Costs 2 Actions).The horror teleports, along with any creatures it is grappling, to an unoccupied space it can see within 120 feet of itself.

Cosmic Horror

Cosmic horrors are colossal, malevolent entities that occasionally slip the bonds of the Far Realm and find themselves adrift on the Astral Plane. Drawn to the light of distant stars, these creatures invade Wildspace systems and lay waste to worlds. After feeding on the minds and bodies of a world's inhabitants until it is sated, a cosmic horror usually returns to the void, where it falls into a deep sleep, drifting aimlessly until hunger or some other stimulus awakens it.

Cosmic horrors are among the most powerful creatures spawned by the Far Realm. No two of them have the same appearance, but they have certain qualities in common. Each one is roughly 100 feet long or tall, and its physical form is a seemingly impossible conglomeration of eyes, mouths, wings, tentacles, and less recognizable organs and appendages.