You can send this card from your hand or field to the GY; place 1 "Black Feather Whirlwind" from your Deck face-up in your Spell & Trap Zone. If a "Blackwing" Synchro Monster(s) or "Black-Winged Dragon" is Special Summoned to your field, while this card is in your GY (except during the Damage Step): You can banish this card, then target 1 "Blackwing" monster in your GY; add it to your hand, then take 700 damage. You can only use each effect of "Blackwing - Shamal the Sandstorm" once per turn.