How it wins
Floods the field with Blackwings, which summon each other for free, then attacks with Synchro Monsters and Kalut boosts until the opponent runs out of Life Points.
Key cards
Blackwing - Bora the Spear
Blackwing - Kalut the Moon Shadow
Black Whirlwind
Tip
Play Black Whirlwind before you Normal Summon a Blackwing, so the summon searches another one. Keep Kalut in hand for a surprise 1400 ATK.