Raising Cicadas

In this world, immortal cultivators can transcend tribulations and ascend, break through the void, and attain immortality. Until three hundred years ago, the sky split in the southeast. In the cracks where time and space collapsed, countless souls that did not belong to this world poured in. They are called alien souls - they wear mortal bodies, but carry the memories, knowledge and ambitions of another world. At first no one noticed. By the time those sects discovered it, everything was irreversible: the skills had been tampered with, the orthodoxy had been infiltrated, and luck had been plundered. Some immortals even discovered that the disciples they had personally cultivated had been taken away by strange spirits at some point. I don't know when rumors started to spread. If we don't kill the alien souls, the avenue will collapse and we will die forever......