The transformation of a Witch Demon can't be forced, but one could start spreading the word in advance to let some people know about the possibility.
Some would surely want to undergo the transformation, and after screening, they could be sent back to give it a try. As for whether they would take this opportunity to turn against him, Fang Jie was not concerned.
In his own stronghold, there were so many troops of Gold Level Combat Power protecting it, that if there were still problems, it would be his own fault. The stronghold had many Death Energy Towers at Silver Level, which could have a certain effect even on Legendary Experts.
As long as they weren't adept at defense, Fang Jie had studied some special cases of those at the Legendary Level.
Legendary denoted a breakthrough to an extreme mastery of one's own Strength, and if a being was adept at defense, then Silver Level Attack Power might not necessarily harm them.