At this moment, when the mutated energy sensed the energy of the thunder ball within the Dantian, the originally extremely ferocious and aggressive mutated energy seemed to be injected with adrenaline. With a thunderous roar, it rushed toward the silver cage.
The cage composed of silvery light was only designed for containment. Although it had some resistance externally, it was not particularly strong. And given Zhu Bufan's current strength, he couldn't lay down a powerful prohibition without harming Yi Yun, so when he initially set this prohibition, Zhu Bufan chose a force that was just enough to suppress the energy within Yi Yun without harming him, resulting in a slightly weaker prohibition.
