χブレード
The χ-blade is a legendary weapon introduced in [[Kingdom Hearts Birth by Sleep]]. It is the original after which all [[Keyblade]]s are imperfectly modeled from. Rather than being a man-made key to an artificial Kingdom Hearts, like the Keyblade of heart, it coexists with the true Kingdom Hearts itself, a perfect union of all hearts and worlds, and is the only thing that can summon its door. [[Xehanort]]'s Report VII According to legend, the Keyblade War occurred because of the many souls who desired to take the χ-blade and Kingdom Hearts for themselves, and [[Master Xehanort]] later enacts his plots with the same goal in mind. 
x-blade