Upon hearing this outcome, everyone suddenly remembered that the Netherworld appeared because of the game on the Doomsday Computer, and the full name of that game was Cyber Netherworld.
This Netherworld is both a Netherworld where you can die, and yet still a game.
One explanation is that the Sacred Fire Sect itself once mastered some bizarre forms of evil magic, which were all lost later on, but the fallen Demon Kingdom and Sacred Fire Sect did possess them back then.
Another explanation is that the opponent's data, like a virus, invades the player; when the player returns, it's as if the virus is brought into a host that can carry these data.
If that's the case, then there are two possibilities.
Under normal circumstances, the virus should lurk, slowly taking effect, gradually seizing the initiative and claiming the whole body, completely devouring everything of the other, adapting over time.
