Creatures/CavernousCreatures

From a post by Quendalon

Blind, mile-long white worms that eat whole villages

Silent, invisible horrors that wither in firelight and consume human flesh; they cannot drink blood, and when they feed they leave pools of blood behind, but no bodies.

Bodiless voices that whisper constantly, incessantly, and feed upon madness and anguish.

Gelatinous entities, large as lakes, that flow through the deep places and consume the spirits but not the bodies of creatures they encounter in their passage. The corpses of their victims rot but slowly as they linger for decades in the depths of the preservative fluid, and the vast jelly-creatures may possess these corpses in hordes, bind them with oozing umbilical cords, and send them forth as warriors, agents and emissaries, seeing through their dead eyes and speaking with their decaying tongues.