Plague of Ebol

The Plague of Ebol was the name for a deadly and gaseous weapon invented by Crudor Leviathas, and Riktof and Kleinz, his two assistants. After his defection from the Shard of the Sun, Crudor wanted to make his mark on the world on the lands of Ebolaia, and sent Riktof and Kleinz there in a flying plane, which dropped the bomb, destroying a large portion of Ebolaia and subsequently rotting it. Because of this, the denizens and beings of Ebolaia are infected, monstrous, and malformed in a large region of the zone.
The Brotherhood and Confederacy later put a respective bounty on whoever deployed the bomb. Later on, after questing in Ebolaia, the adventurer figures out who did it, but because of being unable to track down Crudor, they resign themselves to the fact that justice will never be obtained. This is due to the fact that Crudor was on the Kingdom of the New Sigil which was teleported during the Maelstrom War; he was found later in the Cramoria Remnants.