First, the Buddhism of Vast had colluded with a foreign True Immortal—and one hostile to the human race at that—and persecuted their own race's heavenly prodigy. That in itself was an extremely sensitive matter.
And at the critical moment when the Tribulation of Quantity was about to begin, even Demonic Path villains who liked persecuting Lower Cultivators would only make a move because of profit. They very rarely colluded with foreign True Immortals; ninety-nine times out of a hundred, they did the dirty work themselves!
Moreover.
The Future Sumeru Buddha's secret attempt to harm Divine Lord Yelan was also a major incident—even more dangerous than what happened to Wang Yu that time, and even more worthy of serious attention.
Even if the source lay on the Great Ascension Buddhist Domain's side.
The Buddhism of Vast still needed to be settled with. A cleansing from top to bottom was inescapable, and Wang Yu still had two Old Friends on the Buddhist side.
One was Star Moon Fairy, who was suspected to be the reincarnation of a True Immortal.
The other was Miaoshan Fairy, who was bitterly cultivating the mind and trying to grasp "Asura Killing Heart." Both were Old Friends of Wang Yu. If they were dragged into the reckoning, it would be terrible.
Secondly.
Wang Yu needed to recultivate a Mind Dao cultivation method. The Ink Profound Ancient Emperor Mind Control Dao Scripture in his possession was very good as the main trunk, but with his comprehension, how could he be content with cultivating only one heart scripture?
In the past, he had had no choice. There had only been the Prajna Heart Sutra to cultivate. Now that the opportunity had come, how could he not go sweep through Spirit Mountain? He would replicate every inheritance he wanted to see.