The wondrous method of purification (1)
They were really possessed. However, they were hit by the Orthodox cultivation technique of the Buddhist sect, the wondrous art of purification. This wondrous art of purification was the most difficult to learn among all the wondrous Arts. It was soundless when used, and there wasn't even the slightest mental fluctuation. As long as one was hit by this wondrous art, they would have a good impression of the caster, and slowly become absolutely obedient.
There were two ways to use the wondrous purification technique. The first was more urgent, like a big move, where the wondrous purification technique was used all at once. If the mind and mental power of the person hit by the wondrous purification technique were not strong enough, they would be purified immediately. After being purified, they would devote themselves to the person who had purified them. They might even become fanatical believers who had completely lost their own thoughts.