The Master Has Become Obsessed with Evil, Starting from Letting His Rebels Perish

[System flow] + [Invincible] + [Multiple women] Gu Changqing traveled to a fantasy world and became a saint in less than a hundred years. However, once he was practicing, he was accidentally encountered by an extraterrestrial demon, causing his Dantian to be shattered and all his cultivation was lost! The only good thing is that he still has four filial disciples! But isn't there something wrong with this? You have lost all your cultivation as a teacher, what are you rebels going to do! ······· I never expected that this world would actually be a novel world? Why are they all female protagonists if they weren't my disciples! I am a villain, why did the system come out!