Double strike, prowess
At the beginning of each upkeep choose a creature an opponent controls. When that creature dies this turn, look at the top three cards of your library. Put one of them into your hand and the rest into your graveyard.
Whenever Dayne, Champion of Trickery deals combat damage to a player, you may cast an instant or sorcery card from your graveyard without paying its mana cost. Then exile it.