Lu Yun wasn’t the only cultivator who’d ever had the impulse to refine a formation disk into a treasure—it conveniently enabled one to deploy formations with a wave of their hand. At the same time, he was likely the only person who dared do so.

The creator of the formation disk seemed to have the same thought, but didn’t dare see it through. If the formation disk of a ninth rank formation exploded, it would destroy everything within five hundred kilometers.

Formation disks differed from treasures in that they needed to be arranged for ahead of time so they could absorb the energy of the elements and meld into the environment. It also took some time for a formation disk to activate.

Typically speaking, formation disks were just formations that could be moved elsewhere at any time. When Lu Yun utilized the Nineheavens Brahman Formation to kill Peng Yue, he first used the Connate Great Dao of the Five Elements to collect the origin elements. That was how he set up the formation in such a short period of time...