Erôn-Mystarë; which means "Castle of the Elements" in elvish, was the ancient citadel of the Council of Sorcerë.

In the First Age, this ancient fortress was built directly into the base of Mount Orendren by the Synfari, who had discovered Mount Orendren was the magical epicenter of Corwyn.

The elven fortress was later abandoned during the War of Wrath, and remained vacant for centuries.

In the Third Age, the castle was taken over by the Council of Sorcerë, who rebuilt and enlarged the fortress.

Atop its tallest tower was the Meeting Chamber; a massive, circular room containing a large oaken table.

Desiring its secrets, Alokkair ordered his armies to lay siege to the fortress. But he was defeated by an alliance of elves, dwarves, and men at the Battle of Orgorod.

In the Fifth Age, the castle was conquered by the armies of Sorimmar; who, converted it for his own use.

Once the Dark Lord took over Erôn-Mystarë, he renamed it Erôn-Gothmar; the "Castle of Necromancy."