Reverend Insanity: Poison-Refining Demon Venerable

This is a Fanfiction about Reverend Insanity. A young man dies and reincarnates into a world he knows all too well, the undisputed absolute nightmare difficulty if you are talking about a new life. But he will rise above all else, whatever the price may be. He does not care if he reaches eternity as a saint or a demon, but the world he has been born into may have already decided that for him.