Captain Yvana

+2: Target creature gets +X/+X where X is the number of Pirates on the battlefield.
-3: Search your library for a card called Captain Saphara, then search your library for a card called Yvana's Dreadnought. Then shuffle your library.
-7: Roll a twelve sided die. Look at the top card of your library. If that card's converted mana cost is equal to the die's result, you win the game.