Killing Demons: Starting from the Mental Hospital

This book is no longer linked, so you don't need to pay attention to it. The asylum is not a prison, but a door to another world. When the global elite believes that the demonic invasion is a collective hallucination, only the mentally ill can see the truth. A martial arts genius traveled through time and became a madman, killing demons with the iron pipe of a hospital bed, and discovered that "insanity" is actually the ultimate weapon for mankind to fight against darkness. The madman is the savior, the raving is the prophecy, and the final BOSS may be smiling at you.