EN5ider 170: Terrors of the Deep: Abolethic Servitors (5e)
These horrific monstrosities include the maw swarm (a cluster of living humanoid mouths driven by an all-consuming hunger)¸ oculites (2-foot diameter eyes encased in crystal shells)¸ slitherwhites (amputated tentacles grafted into a knot of writhing flesh)¸ and the slithering crown (a higher form of merged Slitherwhite). Each monster comes with statistics and story hooks¸ and for warlocks and wizards there's also the all-new conjure deep abomination spell.