Aid from the Cowl [Aether Revolt]

Set: Aether Revolt Type: Enchantment Rarity: Rare Cost: {3}{G}{G} Revolt — At the beginning of your end step, if a permanent you controlled left the battlefield this turn, reveal the top card of your library. If it's a permanent card, you may put it onto the battlefield. Otherwise, you may put it on the bottom of your library.