Blackwing - Gale the Whirlwind (Platinum Secret Rare) (RA03-EN215) [Quarter Century Bonanza]

If you control a "Blackwing" monster other than "Blackwing - Gale the Whirlwind", you can Special Summon this card (from your hand). Once per turn: You can target 1 face-up monster your opponent controls; that target's ATK/DEF become half its current ATK/DEF.