C685 The Secret Realm Breakthrough, Immortal Lord Level!!(last part)

Lin Xuan, who was inside the Spirit Energy Protective Barrier.

He couldn't help but raise his head and look at the void a hundred feet away from him. The barrier that was originally almost translucent had started to circulate rapidly under the stimulation of the Thunder Tribulation Power.

It had turned into a crystal.

A crystal that was nearly a foot thick.

Lin Xuan had read about it before