After exiting the gate, use the Roar ability to break some stones and send a sculpture rolling to the left. Follow it and assemble the pieces into a grappling gun.
Turn the crank of the grappling gun to fire it. Then jump up onto the zip line and ride it down to a lower platform to the right. Fight off several wolves who are waiting for you.
Climb up the pipe while avoiding exploding balls that are thrown at you by wolves.
At the top, fight off more wolves, then push a lever on a statue to rotate the statue and raise some steps. Climb up the steps. Then jump up onto another zip line and ride it down to the left.
Attack the brick coverings on the pits and look for a couple handhold pieces after fighting off the wolves in the area. Pick up the pieces and throw them up at the wall on the left so you can climb up a series of handholds. Climb up the handholds to get to a higher area.
At the top of the handholds, move to the right and then jump down onto a climbing wall. Descend the climbing wall, and before you fall off the bottom and down to the lowest level, jump across to a lower platform. Slide under a pillar and then pull a lever on the far left side of the platform to raise the pillars. Move through an open doorway to emerge on a higher platform.
Climb up a wall, then jump across the raised pillars. At the end, jump across to a chain and climb it to the top to get a purple stud. Swing across to the right on the chain and land on a ledge.
Climb a short wall. After a wolf destroys a balance beam, smash some bricks across a doorway and then assemble the pieces into another beam. Move across it to chase after Wiz the Wolf, who is holding Eris captive. Continue across some small steps to the right.
Continue to the right until you get to a platform where Eris is being held. Fight off some wolves, then pick up a steak they drop and throw it at the target over Wiz to shut a hatch. Repeat this two more times to shut all three hatches and force Wiz to come down to you. Now you must defeat him. Stay out of the way of his power attacks and then move in while he is recovering.
Once Wiz is defeated, pick up the lever he drops and insert it into the crank on the right. Use the crank to lower the bag containing Eris and let her out. Once you release her, you also unlock Eris as one of the characters you can control and use in future levels.