Online Game: Dream Space

The beginning of the novel is very ordinary, but as the plot progresses, contradictions and conflicts completely break out. In the early stage, the protagonist showed overwhelming strength when facing various bosses. During the martial arts competition, he faced many masters and launched a fierce battle! As the plot of the second volume unfolds, the protagonist's personality changes drastically after making a deal with the Demon King. The current strength is in a mess. After killing a number of players in the God's Punishment Guild, he also used spiritual guidance to modify the players' consciousness. I am very curious, what secret is hidden behind the blood moon mark?