Muretachi no Tsubame

The is a signature technique that is used by Setsuna.

By slashing through the air, Setsuna can unleash a barrage of green yōki that then takes the form of multiple swallows, sending it towards her opponent at high speeds.

In episode 10, Setsuna demonstrated the ability to absorb the flames of the yōkai Kinka onto the Kanemitsu no Tomoe in order to temporarily enhance the Muretachi no Tsubame.