Benjamin Fisher's actions were clearly premeditated, he had long been prepared to deal with Peter Brown.
In his view, dealing with Peter Brown wasn't difficult at all, he just had to smash him with Heaven-Exploding Thunder, after all, no matter how awesome Peter Brown was, he was merely a person of hundred and eight stars. Even if there were formation defenses, a single blast of Heaven-Exploding Thunder capable of destroying someone of one hundred and fifty stars was enough to kill Peter Brown.
Therefore, Benjamin Fisher had never really cared about Peter Brown.
Today, he did not expect that Peter Brown would discover his secret activities, and so he no longer hid, directly taking out two Heaven-Exploding Thunders that he had secretly prepared.
In his view, using a Divine Artifact refined by Peter Brown to kill him would be an interesting matter.