Tengu format ruling
Armor Breaker
Card effect (current official text)Once per turn, you can equip this card to a Warrior-Type monster you control, OR unequip it to Special Summon this card in face-up Attack Position. While equipped to a monster by this effect, when that monster inflicts Battle Damage to your opponent, destroy 1 card on the field. (A monster can only be equipped with 1 Union Monster at a time. If the equipped monster would be destroyed by battle, this card is destroyed instead.)
Rulings
(1) Once per turn, you can equip this card to a Warrior-Type monster you control, OR unequip it to Special Summon this card in face-up Attack Position. (2) While equipped to a monster by this effect, when that monster inflicts Battle Damage to your opponent, destroy 1 card on the field. (C) (A monster can only be equipped with 1 Union Monster at a time. If the equipped monster would be destroyed by battle, this card is destroyed instead.)
- The (1) Ignition(-like) Effect activates & resolves on the field.
- If activated while in the monster zone, this is a Monster Card's effect.
- If activated while equipped, this is an Equip Spell Card's effect.
- The (2) Trigger-like Effect activates & resolves on the field, it is the effect of an Equip Spell Card.
- This effect activates in Substep 5 - After Damage Calculation.
- This effect targets 1 card on the field.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Tengu forum — sourced change requests get reviewed.