Cyber Vouivre Cuirassée SDMM-FR018

Once per turn, you can equip this card to a "Cyber Dragon" you control, or to a Fusion Monster you control that lists "Cyber Dragon" as a Fusion Material Monster, OR unequip it to Special Summon this card in Attack Position. Once per turn, when it is equipped to a monster by this effect, you can reduce the ATK of the equipped monster by 1000 and destroy 1 face-up monster (a monster can only be equipped with 1 Union Monster at a time. If the equipped monster would be destroyed, destroy this card instead).