Krark, Goblin God

+1: Flip a coin. If you win the flip, Krark deals 3 damage to any target. If you lose the flip, Krark deals 3 damage to you.
-2: Search your library for an artifact with converted mana cost 2 and reveal that card. Put that card into your hand and shuffle your library.
-6: Flip six coins. For each flip you win, you may deal 3 damage to any target. Take an extra turn for each flip you win beyond three.