Keyblade War

Unreleased The Keyblade War (キーブレード戦争) was a mysterious war-like conflict in which many Keyblade wielders fought prior to the events of Kingdom Hearts Birth by Sleep. The conflict aroused when Keyblade wielders of Light and Darkness clashed with each other to create the X-Blade. The failed attempts resulted into the scarred remnants that eventually is the Keyblade Graveyard. It's unknown if there's any survivors of the Keyblade War. However, Master Eraqus and Master Xehanort are shown to discuss the events of the Keyblade War, possibly implying the two are survivors.