Makana, Rakdos' Second

Whenever Makana, Rakdos' Second deals combat damage to a player, exile the top card of your library. Until end of turn, you may cast that card. by paying life equal to it's mana cost
Dash {1}{b/r} (You may cast this spell for its dash cost. If you do, it gains haste, and it's returned from the battlefield to its owner's hand at the beginning of the next end step.)