Creak!
The low door swung open, and a black shape writhed, slowly crawling out from within.
It stood erect with a weird posture, towering over three meters tall.
This monster was entirely black, covered in bulging proliferative tissues, with blood vessel-like patterns twining around its exterior, filled with yellow fluid flowing within.
Above the monster were three thick tentacles, as stout as a normal person's thigh, arranged in an upside-down pyramid formation.
The two upper tentacles drooped to the sides, one with fish gills at the end, and a sinister insect-like mouthpart; the other tentacle was slightly higher, with dozens of small cilia at the tip, and two snail-like stalked eyes wriggling out, staring fixedly with clear black and white human eyeballs.
The tentacle in the middle, like the bell of a trumpet flower, opened to reveal four thinner tentacles.