Having felt the change in his spiritual power, Ye Feng immediately turned his attention to one of the branches on the tree trunk.
There was a bright red fruit on it.
Within this fruit was the Rule Power that Ye Feng had stored using the ability of the Evolution Fruit.
After days of exploration, Ye Feng had gained a general understanding of this energy.
The energy he'd mastered was likely from the Flame Rule, condensed into form.
Perhaps because of this, the Rule Power contained within was exceptionally violent.
The first few times he had tried to harness it, he almost blew the branch off.
Fortunately, at the critical moment, he managed to suppress it, then used the ability of the Evolution Fruit to absorb it back in.
It's worth mentioning that Ye Feng found the Evolution Fruit's ability to be akin to a bug-like existence; it could cram in energy of any form, and once the energy was in the Evolution Fruit, it seemed to be sealed away.