Prowling Demon (5e Creature)
From D&D Wiki
Large fiend (demon), chaotic evil
Skills Perception +5
Multiattack. The demon makes three attacks: one with its bite and two with its tentacles.
Bite. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 13 (2d8 + 4) piercing damage, plus 3 (1d6) poison damage.
Tentacle. Melee Weapon Attack: +7 to hit, reach 10 ft., one target. Hit: 7 (1d6 + 4) bludgeoning damage, plus 7 (3d4) psychic damage.
Prowling demons are created from demons that have failed demon lords as servants for their mortal followers that perform truly evil deeds. They look something like eels with two long tentacles covered in eyes, and they slither on the ground like snakes. Those struck by the prowling demon's tentacles momentarily experience the demon's shattered psyche, and are often haunted by the memories for hours, if not days afterwards.