Doesn't suck. Kage's elbow can be used to enter the Falling Leaf stance (FL) by holding P. In this stance, you will auto reverse and high P attack. The animation has Kage duck between the opponents legs and kick the back of their knee in. It does little damage, but put's Kage in a favourable position (behind them). However, due to the recovery times I don't think there are any guaranteed followups. I will report back if I come across any after more testing. Anyway, the neat thing about Kage's elbow is that it isn't Punch counterable. In fact, if you've entered the FL stance after having your elbow blocked, any retaliatory high Ps from the opponent will be reversed.