With the Keystones, nothing can stop us from opening the Titangate. Beyond lies the Plane of Earth where the Ethians first enslaved the titans. Though the Ethians lost control, we have improved upon the technology. I would like you to have the honor of opening the gate.
We saw what happened at the portal. It seems likely that this titan was a slave to the Ethians who escaped to the Plane of Earth. If he's been plotting vengeance all these centuries, then all Telara is in mortal peril.