Once per turn, you can either: Target 1 LIGHT Machine monster you control; equip this card to that target, OR: Unequip this card and Special Summon it. A monster equipped with this card is unaffected by your opponent s Spell effects, also if the equipped monster would be destroyed by battle or card effect, destroy this card instead. If this card is sent from the field to the GY: You can add 1 Union monster from your Deck to your hand.