Master Xehanort

Flying, Indestructible, Hexproof

Heartless you control gain the Nobody creature type.

Nobodies you control gain the Heartless creature type.

{w}{u}{b}{r}{g}{c}{t}: Sacrifice thirteen creatures you control, and exile seven creatures you don't control. Then, search your library or graveyard for "The X-blade", reveal it, then add it to your hand. Then, if you searched your library, shuffle your library.