I Am a Demon Cultivator and Possess All Five Poisons

[Demon cultivator + darkness + ruthlessness + everyone having fun] If you don't fight or grab, what kind of immortality can you cultivate? The one you like is mine. You won't give it? That means you are ignorant! The protagonist Su Jiu awakens the devouring system and can devoure all spiritual things in the world, including elixirs, spiritual stones, magic weapons and monks. Because of an accident, he was forced to join the Demon Sect and became the twelfth disciple of the Blood Prison Ancestor. The old naughty master, the master who keeps trying to steal his opportunity, the cold-faced and warm-hearted senior brother, and the righteous undercover Ye Han... With the addition of the protagonist, the cultivation of immortals in this world seems to be different... It's like Tao but not Tao, it's like demon... It's also demon! In the end, I discovered that all people and all things seemed to have a certain fate...