Yvana's Dreadnought

Flying
Whenever Yvana's Dreadnought deals damage to
a player, reveal the top card of your library. If it's
a noncreature spell, you may cast it without
paying its mana cost. If you do, you lose life equal
to that spell's converted mana cost. Otherwise,
you gain one life then put it into your hand.
Crew 5