Voidwalk [Gatecrash]

Set: Gatecrash Type: Sorcery Uncommon Cost: {3}{U} Exile target creature. Return it to the battlefield under its owner's control at the beginning of the next end step. Cipher (Then you may exile this spell card encoded on a creature you control. Whenever that creature deals combat damage to a player, its controller may cast a copy of the encoded card without paying its mana cost.)