The Third Worst Thing from Bastion's Underground

The tunnel network underneath Bastion serves as sewer, catacomb, smuggling route, and homeless shelter in equal measure. Neighbouring caves have been disturbed by all this activity, and all sorts of strange creatures pour forth.

Embalmer Crab
STR 18, DEX 16, WIL 5, 12hp, Armour 2. Claws (d10).
Usually found in pairs. Quite content to ignore passers by, unless hungry.
On Critical Damage the crab vomits a gluey fluid over the incapacitated victim, which hardens around them like plaster. They suffocate unless the shell is broken, and the crab will try to carry them back to its home.