Possessed by a Ghost? Clearly, I've Become a Daoist Master!

[Every ghost deserves to die!] [Decisive and ruthless] [No naive do-gooder] [The protagonist is mentally unstable] Chen Dan transmigrates into this hopeless world of ghosts and monsters. One day, he suddenly discovers that the Ghost Containment Bureau is watching him. Luckily, the old Taoist at home has passed down the method of ascending to immortality, the true path to becoming an immortal. This is a world without hope. The only way to leave it is to attain the Dao and ascend, and all Chen Dan has to do is eat. Chen Dan has only one thought: either he eats the ghosts, or the ghosts eat him! [Eat the Staring Ghost and gain the rule: Those who look up must die] [Eat the Knocking Ghost and gain the rule: Those who knock must die] [Eat the Turning Ghost and gain the rule: Those who turn around must die] At last, the Ghost Containment Bureau surrounds him. They insist Chen Dan is a ghost, the most terrifying ghost of them all. "Bullshit! I'm obviously the one who's attained the Dao! Behold my Night Parade of a Hundred Ghosts! Behold my forbidden art... I'm finally about to ascend to immortality!"