The Tablets of Fate were stone slabs on which the official portfolios of every one of the deities of Abeir-Toril were written. Bane and Myrkul stole the tablets from Ao and hid them in Faerûn, suspecting that some of the Overgod's power was derived from these tablets. When Ao discovered the Tablets of Fate were missing he summoned all the deities and asked for those guilty to hand them over. When no one stood forward to admit to stealing the Tablets, Ao cast down all the gods from the heavens, taking their divine power in the process. Ao tasked Lord Helm with guarding the Celestial Stairways which would lead the deities back into their divine realms. For this he retained his divine powers. Before the Avatar Crisis ended, Bane and Myrkul were both slain, although Bane would return in 1372 D