Ok regular tengu is cheap but this is cheaper.
Low short and the rocks will follow: LK, far standing LK, standing fierce.
then far standing short and rocks don’t follow
after you do standing fierce and the rocks are still hitting from before so they can’t get out. The fierce hits and the rocks cover the recovery of the fierce and you can rinse and repeat.
The only way out is to red parry.Infinite block stun you can say. Good for killing them off.
PS this is done with a little distance from your opponent.