Taer Sadaen

According to the Book:

This fortress, built during the Age of Monsters, was the site of a terrible final battle between the elves and hobgoblins. The ruins have never been found. A powerful elven curse pulled the fortress out of time, and when the stars and the rings of Siberys align, Taer Sadaen reappears for a night, the battle still raging.

Type

Fortress