Karsus's avatar

Karsus's avatar was a very powerful spell which altered the very disposition of reality.

Effects
The spell was even capable of allowing its user to become a god of their choosing, replacing a current god with themselves the moment the spell was completed.

Components
It was so complex that the wizard had to put a stone-filled gizzard of a gold dragon into a mixture of tarrasque blood and 12-headed hydra bile to just enchant one of the material components of the spell. It had a casting time of six hours.

History
The creation of this spell was finished by the Netherese archwizard, Karsus, in -340 DR, and fatefully used the one and only time the following year, causing the Fall of Netheril. Karsus's original notes regarding its creation were never found. Whether the gods were able to defend against the spell, or were aware of its casting, are unknown. Karsus spent well over a decade researching this spell. It was believed Mystra, the reincarnated form of Mystryl, snatched the spell information from the ruins of Karsus's enclave and sent it on an eternal journey to the ends of the universe.