Z-Zillion Tank

If this card is Special Summoned: You can equip 1 of your banished Level 4 LIGHT Machine monsters to this card, also you cannot Special Summon from the Extra Deck for the rest of this turn, except LIGHT monsters. Once per turn, you can either: Target 1 Machine monster you control; equip this card to that target, OR: Unequip this card and Special Summon it. If the equipped monster would be destroyed by battle or card effect, destroy this card instead.