The Divine Supreme – Chapter 2817

While they argued in Netherhold, the three Immortal Emperors were having a discussion outside.

"How could there be chaos in the Upper Realms? It seems like the Celestial Barrier was activated."

Whitney was stunned as he performed his divination. It wasn't just him, Nulas and Harold were also aware of it.

The Celestial Barrier outside the Heavenly Gate was initially set up by the four Immortal Emperors along with Francis. Each of them set up the barrier in the cardinal directions, while Francis connected all sides from the center.

Even though Remus' attack was targeting one section, the others would still be able to sense it.