(chaotic, qlippoth, evil, extraplanar)
Source: It Came from Hollow Mountain, pg(s). 86
A vexenion resembles a blood-red bloated, pulsating tumour. Muscular tentacles and eyes can sprout from and quickly disappear into its mass.
Vexenions feed on flesh by absorbing prey through their skin, digesting them with their acid and expelling the indigestible parts. As it finishes consuming the flesh, the forever-hungry vexenion continues to hunt for more food.
Vexenions are at home almost everywhere as long as there is prey. Ambush predators, they prefer to lair where they could hang themselves high, taking advantage of their climbing skills, to drop down upon unsuspecting prey. Despite their size, their bodies are amorphous enough to fit through narrow confines in dungeon complexes and temples of Yamasoth, as long as they are not currently engorged.
Vexenions reproduce via mitosis. When one has fed enough flesh, it hides, retreats its tentacles and eyes, and hardens its outer shell such that it is difficult to discern from normal rocks. While gestating, the vexenion stews a rancid amniotic fluid that can be refined into vexenion catalyst. After 24 hours, two vexenions emerge, both retaining the parent's memories.
In qlippoth armies, vexenions usually serve as shock troopers and vanguards. Yamasoth employs them to gather materials for his experiments, but cares not where they travel, so they have proliferated across the Abyss. Vexenions are sometimes found in the company of nyogoths, one of the very few creatures in the Great Beyond that vexenions find inedible.
Vexenions are intelligent and delight in asking their victims about their favourite food, or sharing their hungers and the flavours of their food with others. They have a sadistic habit of talking about the flavours of a creature with that creature itself as the vexenion digests it.