Ziggurat of Mag

A simple A4 dungeon, 14 keyed locations.

The priests died of a curse, long ago. It's said a terrifying venomous bear lairs here, guarding an ancient weapon named Kyronax Death-of-Songs. 
The interior is very dark and mostly chill.

This haunted ziggurat has weird magical linkages between some locations, a savage beast that responds to the adventurers' actions, an undead, some interesting treasures, and a couple of Fey "sleeping" in the abandoned priestly chambers. The Fey get angry when they're interrupted.

An excerpt from Paladins of a Vanished God.