A Mage's Sword Can Slay Gods

No overpowered protagonist + no harem + some brain-teasing twists + scheming protagonist + a universe populated by many civilizations + witty humor

Just as the protagonist thinks his father is about to teach him swordsmanship, his dad inexplicably drops him into a game!

When the protagonist assumes it's just an ordinary game his father developed, he comprehends the Way of Laws inside it.

But just as he grasps the Way of Laws, he learns that the power of the laws has vanished.

Before he can investigate the mystery of their disappearance, he discovers the universe's many civilizations and the crises they face!

Before he can explore the universe and resolve its crises, his advancement gets stuck on the path to the new cultivation system for the New Humans!