Lin Yuan had three spirit roots. After unexpectedly obtaining a black stone, he was lucky enough to join the Tianxuan Sect. Given his decent aptitude, Elder Zhou immediately took him on as a personal disciple.
But less than a day after Lin Yuan became a personal disciple, the black stone in his dantian began devouring the spiritual energy he had painstakingly cultivated as he tried to draw qi into his body. Elder Zhou decided there was something wrong with his dantian and dumped him in the area for laboring disciples.
After a few strokes of good fortune, Lin Yuan finally solved the problem of the black stone devouring his spiritual energy.
Only later did Lin Yuan gradually learn that Elder Zhou had taken him on with ulterior motives.
Moreover, because the Demonic Beast Mountains lie in a remote corner of the cultivation world, the three great cultivation sects standing there are only respectable on the surface. Behind closed doors, they're no more virtuous than the Heavenly Demon Sect.
Very good, nice to listen to