Tengu format ruling
Armory Arm
Card effect (current official text)1 Tuner + 1 or more non-Tuner monsters
Once per turn, you can either: Target 1 monster on the field; equip this card to that target, OR: Unequip this card and Special Summon it in Attack Position. While equipped by this effect, that target gains 1000 ATK. If that target destroys a monster by battle and sends it to the Graveyard: Inflict damage to your opponent equal to the ATK of the destroyed monster in the Graveyard.
Rulings
- If the destroyed monster isn't in the GY when this resolves, no damage is dealt.
- You can equip this card to an opponent's monster. If you do, and that opponent's monster destroys your monster by battle, your opponent takes the damage (Arm is still your card, in your Spell/Trap Zone).
- If control of the equipped monster is changed, this card does not change control.
- The damage dealt it equal to the atk of the monster on the field. If "Tragoedia" is destroyed, damage will be dealt equal to its atk 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.