Use "Blackwing - Sirocco the Dawn" to increase this card's ATK immensely, then attack a Defense Position monster your opponent controls for maximum piercing battle damage. If there are even more "Blackwing" monsters on your field, this card's piercing battle damage can be increased even further with the effect of "Sirocco".
You can also discard "Blackwing - Kalut the Moon Shadow" during the Damage Step when this card attacks a Defense Position monster to further its piercing battle damage even more.
"Double Attack" can be used alongside with the effect of "Blackwing - Sirocco the Dawn" to quickly set up an endgame situation. Ditch a card like "Destiny HERO - Dasher" that is useful in the Graveyard, just in case it doesn't finish them off.