Swan King, Addaim

+1: Creatures you control get Lifelink, and Vigilance until the end of the turn.
-1: You may double the mana in your mana pool this turn. Mana produced this turn does not empty from your mana pool until your next end step.
-4: You may search your deck for a card and put it into your hand. Shuffle your library afterwards. You lose 2 life.