Gods' Hammer

A punishment from the Gods according to those that lived in Syrill. The Gods’ Hammer struck Syrill like a purple bolt of death, ripping the land apart and unleashing hordes of twisted aberrations and vile demons upon those that survived the strike. The Gods turned their backs on the people, and the people turned their backs on the Gods in defiance.

Possibly the same thing as the Heaven Rock and Amenoth.

Gods' Hammer

Ur-Delth Sebos