While Humans Learned Magic I Already Built City, Spaceships And Started War With Whole Galaxy

What the story is about

Leon descends into a frozen, monster-haunted region of another world, where he uses a civilization-building system to turn a desperate settlement of Norse raiders and captives into a growing city. As he unlocks ancient wonders, magical resources, and new technologies, he works to expand his territory and prepare for the dangers drawn to his civilization.