The spire is formed.

Geological / environmental event

The earth itself reacted to the evil contained within the castle known as Mosul Pearl and thrust the castle 3000 feet into the air forming a great spire.

With malevolence on the wane, the cleric Danar Rotansin sought once and for all to rid the world of its remaining evil influences. This powerful figure began to gather up all the evil artifacts, objects of dark power, trapped essences of vanquished fiends, demonic relics, and even the last vestiges of particularly horrible diseases.   Condemning all of these things as “banes,” Danar imprisoned them. He believed that, if destroyed, the banes would simply release their evil into the world to wreak more havoc and bring about other darknesses. Destroying banes begat new banes.   So Danar used powerful spells and magical items to accomplish his task, working tirelessly to bind these legacies of evil. As his collection of banes grew, he began to bury them beneath his tower, Mosul Pearl, located near the sea. Danar constructed a vast catacomb, well warded and sealed, deep underground, and he called it Tremoc Korin, the Banewarrens. He also found allies to aid him in his cause. Among them were the dragon known as Saggarintys the Silver King and a number of celestials.   But Danar’s goal was folly. Concentrating so much raw hatred and despite—so much darkness and evil power—in a single place was a terrible mistake. The earth itself, no longer able to tolerate the concentrated evil that the banes represented, thrust Tremoc Korin away from it, creating a tall, impossibly high and narrow spire atop which Mosul Pearl stood, this is what is now known as The Spire.