Silvanus didn't know what kind of looks Silas and Drake were giving him, but he was sure of one thing—he had acted intentionally. If Silas hadn't stepped in at just the right moment, he would have killed Robert.
Based on his current information, those implanted with frog skin might escape the relentless itching and avoid immediate death. Still, they were doomed to transform into monsters on the day of the sacrifice. When that time came, Robert would be something they had to kill anyway—there was no way to reverse it.
If that were the case, it wouldn't matter if he died now. It would mean one less monster to deal with in the final battle.
Moreover, Silvanus had no intention of allowing the Prophet to become a god that anyone could approach and speak to without reverence. There had to be a deterrent. After all, the Prophet could not be perceived as a weak deity. This was merely an effect—to make the Prophet's power appear all the more striking and awe-inspiring.
