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 - $16.50
Lightly Played Unlimited - $15.85
Moderately Played Unlimited - $13.50
Heavily Played Unlimited - $11.80
Damaged Unlimited - $8.45