Heart of Blasphemy

Demon and Devil creatures you control have +{x}/+{x} where {x} is the number of Demon and
Devil creatures, you control
-{2},{t}: Target God or angel you control loses all creature types then gains Demon typing.
-{3},{b}{b}: Exile all Angel's and Gods on the battlefield, then any cards that share a name with a card exiled from Heart of Blasphemy are also exiled.
Exile Heart of Blasphemy.