The plunder of the heavens begins with the Spirit Cage.

Good news: Lu Qianwei has been reborn, and in the future world no less!
Bad news: I've been reborn into the world of Ling Cage!
2046: Humanity, overcrowded on Earth, ventures into the stars, only to be met with a violent geological upheaval caused by an unusual lunar phase.
The Mana ecosystem disrupted the natural cycle, and natural disasters took away a large number of people.
2054: The first generation of Undying Devouring Beasts appeared, and humanity was almost extinct!
That year, Lu Qianwei turned 27, and his good days were about to begin, because he had a spacetime system!
The Devouring Beasts are merely nourishment for the system to absorb high-energy substances!
With abundant energy, space and time opened up for him!
Shortages of supplies, technological stagnation, and insufficient population... none of these were problems in the face of his steel and guns!