Hiken: Tsubame Gaeshi

Hiken: Tsubame Gaeshi (Secret Sword: Swallow Return) is a Special Move shared by Ukyo Tachibana & Yumeji Kurokouchi, first appearing in the original Samurai Shodown and first used by Ukyo.

Description
The user slashes the air, creating a bird-shaped projectile; in the case of Ukyo, it's orange. In the case of Yumeji, it's purple.