Memory:Stone grue

From what you can see of it from here, this creature must be huge... other than the occasional horn sticking out or bits of skin, the beast is totally cloaked in a field of darkness. Loud gurgling sounds audiate from the moving shadows, and the clicking of it's nails on the floor can be heard as it moves. From it's basic struture, it resembles a warthog, but no warthog is this big or this fearsome looking... You've seen a lot of bad stuff, but this takes the serious biscuit: a part of wall that suddenly opens a mouth full of sharp stone spikes and snaps at you. The depth of its maw is shrouded in an unnatural almost solid blackness and a dry smell of burnt stone and pure evil rises from an invisible throat.