Ravenous Chorus of Unreality
Habitat: Underdark; Treasure: None
Gibbering mouthers endlessly feed on and regrow their own amoeboid bodies—amorphous heaps roiling with eyes, teeth, and strange organs. These mind-bending terrors sing and scream, laugh and cry with a cacophony of voices ranging from disturbingly unnatural to shockingly familiar. They exist only to feed and to unleash their disdain for reality, their many maws dripping with otherworldly spittle.
Gibbering mouthers come into being in various unpleasant ways. Roll on or choose a result from the Gibbering Mouther Nascencies table to inspire what brought one of these horrors into being.
| 1d6 | The Gibbering Mouther Is … |
|---|---|
| 1 | Another creature warped by dangerous magic. |
| 2 | The autonomous appendage of a chaotic deity, Far Realm entity, or star-spawn horror. |
| 3 | The experiment of an aberrant manipulator. |
| 4 | Part of the life cycle of some other Aberration. |
| 5 | A shape-shifter that lost control of its powers. |
| 6 | Someone cursed by a cult or vengeful deity. |
Alas, the Elder Elves made a fatal mistake. When the Dragon’s Tear comet next returned, the Vast Gate—still keyed to the Far Realm of alien entities—linked to the comet and opened again. And what emerged, ululating profanities, sang unnameable hungers into an unguarded world.
—From The Book of the Gate,
found near Firestorm Peak
Aberrant Ground. The ground in a 10-foot Emanation originating from the mouther is Difficult Terrain.
Gibbering. The mouther babbles incoherently while it doesn’t have the Incapacitated condition. Wisdom Saving Throw: DC 10, any creature that starts its turn within 20 feet of the mouther while it is babbling. Failure: The target rolls 1d8 to determine what it does during the current turn:
1–4. The target does nothing.
5–6. The target takes no action or Bonus Action and uses all its movement to move in a random direction.
7–8. The target makes a melee attack against a randomly determined creature within its reach or does nothing if it can’t make such an attack.
Bite. Melee Attack Roll: +2, reach 5 ft. Hit: 7 (2d6) Piercing damage. If the target is a Medium or smaller creature, it has the Prone condition. The target dies if it is reduced to 0 Hit Points by this attack. Its body is then absorbed into the mouther, leaving only equipment behind.
Blinding Spittle (Recharge 5–6). Dexterity Saving Throw: DC 10, each creature in a 10-foot-radius Sphere centered on a point within 30 feet. Failure: 7 (2d6) Radiant damage, and the target has the Blinded condition until the end of the mouther’s next turn.
