I Am the Most Connected Person in the Mental Hospital

The protagonist Lu Yan hides a broken ancient book in his body that only he can see - "The Ledger of Evil". It's not a system, it's a debt book. Background: What Lu Yan doesn't know is that he is the descendant of a bloodline of "transcendent lonely souls" that is about to be cut off. A hundred years ago, his ancestors owed the underworld a "Dayang Debt" of 100,000 meritorious deeds in exchange for Yangshou. This debt was sealed in his blood. Now the world is strangely recovering, the seal is loosened, and the underworld is demanding the debt from him again: The account book records the debt he owes to the underworld (measured as "soul debt"). If Lu Yan dies before the debt is cleared, his soul will be directly sent to endless refining for 3,000 years. Saving or subduing a ghost does not "give him a reward", but "repays a debt" - the more ferocious the ghost, the more debt it can repay. The source of his physical combat power is also extremely particular: his body will instinctively activate the ancestral ghost-exorcism technique in an unconscious state (during a psychotic episode), but he himself does not know the principle at all. This is the truth behind him being locked up in a mental hospital for ten years - it's not that he's crazy, it's that he can always beat out "the kid in the consulting room" when he has an attack. The doctor thought he was a violent patient.