Taniran, Skyclave Delver

+2: Look at the top four cards of your library. You may exile an equipment from among them. Put the rest at the bottom in any order.
-1: You may exile an equipment you control. If you do, target creature gets -X/-X until end of turn, where X is its converted mana cost.
-7: You may cast any number of equipments you own in exile this turn without paying their mana costs. Equip abilities cost 0 this turn.