After the cutscene is over, go to the opposite end and open the two Red Orb Chests. Now go to the complete opposite end and crack open the door to activate the crystal above the cage, which will activate the Eyes of Truth. When you close the door, you see a handle dropped on the cage.
Go to the handle and start pulling it to the left until the Eyes of Truth opens up the Fury Barrier. When you can't pull the handle anymore, create a clone and then go through the portal.
