Master Xehanort

Master Xehanort (voiced by Leonard Nimoy) is the main antagonist of the Kingdom Hearts games. He is a Keyblade Master who was obsessed with the legendary Keyblade War. He and his apprentice Vanitas tried to create a χ-blade to create another Keyblade War. Master Xehanort unlocked his heart and forced it into a younger Keyblade wielder named Terra.