Dragon?

"Dammit! I knew it wouldn't be that simple, but still, if they have such protection in this room, that means it's quite important. 

What's really happening on the other side? Did Edward create a huge chaos there coincidentally at this moment?"

Jake's eyes locked on the gate. He still didn't give up on entering it.

He stood up and wiped the blood from his mouth. With a grin, he took a pill, recovering his bones.

His shadow then moved like it was alive, covering his body and enhancing his physical strength multiple times. With a shadow-infused dagger, he started poking through the wall, trying to dig his way in.

At first, the digging proceeded smoothly, but it soon started meeting resistance and then was deflected.

This made Jake realize the barrier had properties that allowed it to deflect attacks back.

"I don't believe they can deflect everything. There should be a limit to it. And for what's inside…"