He was born when Sora connected with his friends hearts and memories, since Anthoxer is a Unversed opposite of all life, he is actually the accumilation of Sora and his Friend's Darkness over a large amount of time ever since the young Key Bearer was born, Anthoxer seems to be connected with the original Xehanort and therefore feeds information through to Xehanort's Dark Chasers whom follow his every command and whim as their Messiah. As the opposite of all life, he is obsesed with ending life AND casting the entire Realm of Light into the Dark Realm while being around to watch the inhabitance suffer, his Keyblade was born of the union between Vanitas and Master Xehanort and therefore the blade of his Keyblade looks a lot like Vanitas' gear however it has a number of demonic spines produci