devorer
Devorer is a term used in fantasy, folklore, and speculative fiction to denote an entity whose defining trait is the consumption of others or of matter and energy. Etymologically, it combines devour with the agentive suffix -er, and in practice it is often used as a generic label for a type of predator rather than a fixed species.
In traditional and modern folklore, devorers are portrayed as insatiable beings that feed on life force, light,
In contemporary fantasy literature, role-playing games, and video works, devorers are common antagonists or boss-type threats.
Scholarly and fan discussions about devorers tend to treat them as a trope that embodies existential threat