Volatile Abomination

Trample
Volatile Abomination's power is equal to the number of creature cards in all graveyards.
When Volatile Abomination attacks, you may exile target creature card in a graveyard with converted mana cost equal to or less than Volatile Abomination's power. Put a token onto the battlefield that's a copy of that card except it's a Mutant in addition to its other types.