This is a rig for a dragon pet in the game Path of Exile. The rig contains IK/FK for arms, legs and torso. The legs contain a controller used to pose the ankle, giving the animator great and easy control over the legs, as they both have the smooth, spring solver to control the entire leg, but another IK solver on top of that giving easy control over the ankle. The rig was made for Grinding Gear Games as part of a rigging test.