This one I might build! Wrexial is one of my favorites, and Gyurda is a lot of things I love in a card: mill, reanimation, etb trigger, and a kraken! Step 1 is all the clones, and try to build in such a way where we could chain Gyurda's like the pioneer deck. Other good value etb creatures, ways to reuse etb's, kraken matters cards, mill out subtheme. Figuring out ways to use that extra odd mana! Seems fun, and the restriction is actually great in edh, as many packages get past it and it forces you to use cards and not use cards breaking up monotony.