Keep going towards the "people" who keep advancing the pathway to you. You'll pass by a Titan (I think? Similar to the Centaurs? They do that stupid Forge Blade thing) I would suggest killing it, what you get when you jump through the portal is totally worth it.

Then follow your directional arrow. You have to have those "things" advance it for you a few more times before you get to the very back of the room.