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 - $19.20
Lightly Played Unlimited - $18.20
Moderately Played Unlimited - $16.30
Heavily Played Unlimited - $14.40
Damaged Unlimited - $13.40