Shadow Altar

The Shadow Altar is a former altar to the deceased solar deity Amaunator that has been corrupted by the Shade Lord, transforming it into a portal to the Plane of Shadow. It is found at the very end of the Ruined Temple, and serves as a component in the "boss fight" for the quest Investigate the Deaths in the Umar Hills.

Combat
The Shadow Altar cannot attack directly. Instead, it periodically spawns a Shadow to attack the party, in a manner similar to the Mephit Portals from Irenicus's Dungeon.