Gilgamesh, King of Babylon

Equip costs of equipments you control are {0}
Noble Phantasm-If this card battles a heroic spirit, you may pay 5 life. If you do, you can destroy any number of equipments you control. Create a colorless artifact equipment token names "Key to the Vault" onto the battlefield. It has "Equipped creature gains +x/+0 and indestructible, where X is the number of equipments destroyed this turn." and equip {0}.