Hedronic Seal

Whenever a nonlegendary colorless creature
enters the battlefield under your control,
hedronize. (Roll an eight-sided die, then perform the
action indicated by the result.)
Whenever permanent with converted mana cost
8 or greater enters the battlefield under your
control, hedronize twice.
As the Titans swarmed across Zendikar, they left in
their wake, a blight of horrid beauty.