The First Encounter

It emerged from the crater by increments, with weird jerky movements, as if all the connective tissue between instances was lost in the moments no one was actively looking at it. It was grey, the fingers were clawed like a Stenza's, but great grey bird wings rested on its back. The wings never moved (that anyone could find evidence of), so they always sat folded, like a taxidermy of a bird. Its face was smooth, even twisted into a snarl as it was (presumably with the effort of cimbing out of the crater). It had fangs, and a strangely flat mouth; the tongue and palate were almost flush with the fangs as though the whole thing had been carved.
But who would carve such a thing? Who would deliberately make a deformed corpse out of stone?