Karzog, the Twisted Maw

As an additional cost to cast this spell, exile two
target Dinosaur cards from your graveyard.
Menace, trample
Whenever Karzog, the Twisted Maw attacks,
untap all creatures defending player controls.
Whenever Karzog deals excess combat damage to
a creature, Karzog deals 2 damage to that
creature's controller.
Discard a card: All creatures able to block Karzog
this turn do so.