If you mean the spinning attack, charge the beam naginata like you would any other chargeable weapon.

@@KaiKatsuda Thanks. I was able to complete this boss rush in 2:59. You hold left click on pc until the crosshairs change and then it does this special move. I just bought the game on pc a few days ago and was trying to figure this out. But got it thanks.

Lol

It gonna die, all hail our superior JP overlords.