Once per turn, you can either: Target 1 "X-Head Cannon" or "Y-Dragon Head" you control; equip this card to that target, OR: Unequip this card and Special Summon it. A monster equipped with this card gains 600 ATK/DEF, also if the equipped monster would be destroyed by battle or card effect, destroy this card instead.
![Z-Metal Tank [SBCB-EN065] Common](http://www.cardmerchanttakapuna.co.nz/cdn/shop/products/8c089316-e95f-5f60-9400-cd3507301590_3c169a91-7fac-49d3-a4e1-e4a95656b018.jpg?v=1710854113&width=1445)