OGC:Slitherwhite (5e Creature)

Medium aberration, unaligned

Armor Class 13 (natural armor)
Hit Points 71 (13d8 + 13)
Speed 20 ft., swim 40 ft.

Saving Throws Dex +3
Condition Immunities prone
Senses , blindsight 30 ft.,passive Perception 10
Languages understands Deep Speech but cannot speak
Challenge 1 (200 XP)

Aberrant Physiology. The slitherwhite has no mouth, instead absorbing all of its sustenance through its skin. It can breathe air and water. It has disadvantage on saving throws against gaseous or cloud-based effects, as it cannot hold its breath.

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The tentacles of the aboleths are more than they seem. Through certain alchemical processes that only an alien intellect can comprehend, the tentacles are duplicated through budding. The aboleth have learned that they can create servitors by amputating several such additional tentacles and grafting them together into a living knot of writhing flesh. The tentacles gradually fade to white, as the abolethic mucous cloud alters them until they exude their wastes as virulent toxins.
Mindless Servitors. Slitherwhites are not appreciably sapient; they possess complex sensory ability, but only the faintest modicum of cognition. This is entirely sufficient for them to receive simple telepathic commands from the aboleths, who use them for experimentation and waste disposal. They can also undergo further transformation into slithering crowns.