Zero Gardna [SOVR-EN006] Rare Ancient Sanctuary if a "Battlin' Boxer" monster

if a "Battlin' Boxer" monster you control battles an opponent's monster: You can detach 1 Xyz Material from this card

Each time a Zombie-Type monster is Special Summoned successfully

You can only use the effect of "Thunder Sea Horse" once per turn

Set: Duelist Pack 2: Chazz Princeton Card type: Equip Spell Rarity: Common Increase the ATK of the equipped monster by 800 points for each other face-up monster on the field with the same name as the equipped monster

or Special Summoned by Tributing 1 Level 10 "Ultimate Crystal" monster (in which case you do not use "Polymerization")

Zero Gardna [SOVR-EN006] Rare Ancient Sanctuary if a "Battlin' Boxer" monsterSet: Stardust Overdrive Card type: Effect Monster Rarity: Rare Attack: 0 Defense: 0 You can Tribute this card to activate its effect. If you do, monsters you control cannot be destroyed by battle, and you take no Battle Damage, during this turn. This effect can be activated during either player's turn.