This is how immortals are cultivated

Good news, Fang Suichu traveled to the immortal world full of spiritual energy. When he woke up, he was in the immortal mountain gate, becoming a new disciple, and also had a system.
The bad news is that the immortal world is fake. The so-called immortal world in this world is more like a Chinese Cthulhu, practicing various strange curses. Moreover, the so-called new disciples are actually sold to strange sects as training materials.
The worse news is that Fang Suichu's system really regards this place as an orthodox world of cultivating immortals.