During either player's Damage Step, when a "Blackwing" monster you control is attacking or being attacked: You can send this card from your hand to the Graveyard; that monster gains 1400 ATK until the End Phase.
Near Mint Unlimited - $30.00
Lightly Played Unlimited - $27.00
Moderately Played Unlimited - $24.00
Heavily Played Unlimited - $19.50
Damaged Unlimited - $16.50