Plenty of cards can help Blackwings, but generally you'll want
to stick to the same backbone:
3 Blackwing - Shura the Blue Flame
3 Blackwing - Bora the Spear
2-3 Blackwing - Sirroco the Dawn
2-3 Blackwing - Vayu the Emblem of Honor
2 Blackwing - Blizzard the Far North
1 Blackwing - Gale the Whirlwind
2 Black Whirlwind
1 Allure of Darkness
3 Icarus Attack
2 Bottomless Trap Hole
Those are really what you need; other cards like Delta Crow -
Anti Reverse or Mirror Force/Torrential Tribute can really help a
lot.
Also about 2 Blackwing - Elphin the Raven and 2-3 Blackwing -
Mistral the Silver Shield