Number S0 Utopic ZEXAL

"ZEXAL" creatures you control get +X/+X, where
X is the number of "ZEXAL" creatures you control.
Whenever you cast a creature spell from your hand
,exile cards from the top of your library until you
exile a legendary nonland card with lesser mana
value. You may cast that card without paying its
mana cost. Put the rest on the bottom of your
library in a random order.