Si Ren frowned in the shadows. He could clearly sense that the barrier had been breached, yet the early warning system had shown no signs of activating at all.
Flame Prison could be said to be the most heavily fortified and secure location in the Underworld, second only to the Fengdu prison. Yet even so, it was about to be bypassed—and bypassed in a way that alerted no one whatsoever.
As the black mist continued to encroach, the light of the barrier began to flicker erratically, as if locked in a fierce struggle against this mysterious force.
Chapter 1507