Mortholme

Mortholme is a ruined town in the north of Tyrrus. In fact, it was the northernmost settlement in Tyrrus, prior to becoming a ruin. The town was founded in 6.52 by Zaikerik the Betrayer, located around the ruins of the Blackspire. The town was a refuge for those fleeing the crumbling remnants of the Rune Kingdom. The purpose of the town was to study the effect that the Blackspire had had on reality, when it broke the First Veil. This lead to the development of Necromancy.
In 6.71, After Zaikerik was slain by Solas Sorrowsong, his loyal cult in Mortholme all ritualistically committed suicide to join him in the Spirit Realm, and continue to aid him. Since then, the town has been a ruin, and was never resettled by living humans.
In approximately 19.80, the Cult of the Blackspire returned to Mortholme with a host of mindless undead minions, with the goal of rebuilding the Blackspire. The site also became the headquarters of Zaikerik's Black Legion. They finally finished building it in 20.18, but before Zaikerik could make use of it, the Saviours arrived with an army and defeated him.
Since then, Mortholme has been guarded by Velkyn's Knights, on a constant solemn vigil to prevent the Blackspire being rebuilt or meddled with again.