How to blend animations for legs only

I am trying to blend animations using ‘Layered blend per bone’ node.
Problem is, it seems to be designed for blending anims from spine up. How can i blend animations for legs only?
What i want to accomplish is to add legs animation for player turning in place and i have no idea how to do.
Any advice is appreciated.

Well, in most cases the locomotion and the legs are the base layer, and everything else is layered and blended on top of that. So you can make a locomotion state machine, that handles everything like running, idle, and idle turns, then the upper body could have various layered animations playing on it. So instead of using a blend node to blend animation onto the feet, have all of the leg animations be the base or bottom layer. Hope this helps!