"Myriad Ghosts' Grievances" was a place unique to the Ghost Domain, where countless resentful spirits and ghosts gathered. These ghosts had lost their minds because their obsessions or grievances ran too deep. Most of them could not cultivate, so they gathered together of their own accord, barely clinging to existence.
Of course, if these wandering souls encountered a fortuitous opportunity or let go of their obsessions, they could also become ghost cultivators—though only the lowest-ranked ghost servants. But most resentful spirits and ghosts drifted here mindlessly day after day, and in the end, they were either devoured by stronger resentful spirits or dispersed completely.
Therefore, every so often, Ghost Emperor Mei Huan would personally act to clear away the resentment here. He would not wipe out all the resentful spirits entirely, because their existence could nourish soul veins.
Before heading to the Ghost Domain, Yunxi had done her homework. She felt that if she were an Evil Immortal, spreading Black Beetle larvae within "Myriad Ghosts' Grievances" would yield unexpected results. It could create more ghost cultivators controlled by the Insectoid Race, and it would be difficult to detect.
She had once spoken with Di Fei and learned that Ghost Emperor Mei Huan had once purged "Myriad Ghosts' Grievances." The reason given was that Evil Immortals had used Myriad Ghosts' Grievances to create puppets, and they had taken the opportunity to capture High-level Ghost Immortals who had defected to the Evil Immortals. The matter had caused quite a stir at the time; all the Ghost Monarchs and Ghost Kings in the Ghost Domain knew of it.
To prevent puppets already completely controlled by Evil Immortals from infiltrating the High-level Ghost Immortals of the Ghost Domain, every Ghost Monarch and Ghost King had separately gone to see Ghost Emperor Mei Huan.
After