This just gives a general idea of how Mucogoloth is supposed to look.

Mucogoloth is a super sticky snot demon that appears to be a mountain of snot from a distance. His body is a massive blob of oozing snot and mucus. His head is adorned with gooey horns, with one set pointing up, one set pointing out, and a large set of horns pointing up and out. The snot demon also has a snout, where his nose and mouth are. The snot demon also has a snot beard and white eyes. The demon also has gloopy arms. Mucogoloth is also capable of summoning floating blobs of snot capable of capturing creatures and bringing them toward him (not pictured in this reference).

The Snot Gloopiness is meant to show that this snot demon is really sticky and gloopy.

Mucogoloth gets more power (and thus more stickiness) the longer creatures are stuck in him, so if you are stuck in Mucogoloth you aren't getting out... at least for a while.

Mucogoloth has an indeterminate size due to being able to absorb snot to gain mass.