It is said that when Netherese Archwizard Karsus tried to attain godhood by siphoning Mystryl's mantle as Goddess of Magic, Mystryl saw the damage he was doing to reality and sacrificed herself to preserve magic. In the moments after all magic ceased to exist and Mystryl being reborn as Mystra, the Archwizard Karsus lay dying on the ground, his final sights being the beloved flying cities crashing into the ground, killing every one he knew and loved.