Only if you really want that. I've actually got an Xyz Professor in mind if you want to stick with Dark World guy.

Also, just to clarify because this is a fairly common mistake among Yu-Gi-Oh! fans everywhere, even on some "professional" websites: XYZ is a group of three monsters that fuse together (eventually expanded to VWXYZ and five main deck monsters) while Xyz is the form of Extra Deck Summon. I promise the "y" and "z" are lowercase on the Extra Deck Monster.