Reborn with a Mercenary System

In his previous life, he was a mercenary. During an assault on a laboratory, he seized an artifact from a mysterious civilization discovered in space by the enemy. But the laboratory self-destructed, and he was reborn. With the aid of a mysterious System from a level-nine cosmic civilization and its missions, he rises through the ranks from a level-one to a level-nine civilization. Armed with the mysterious civilization's advanced technology and the lives of the universe's civilizations, he journeys from Blue Star, step by step, toward the center of the cosmos.