第1章 钉子发射器 

Nail Launcher

[Nail Launcher lv.0: 100% (effective range 2 meters, maximum range 6 meters; upgradeable)] → [Guaranteed Nail Gun lv.1: ... (with built-in crosshair; effective range 3 meters, maximum range 9 meters)]
As long as you keep upgrading, the range can be continuously improved, without limit.
What will an ordinary nail launcher look like if it keeps upgrading?
What will happen if an ordinary nail reaches the speed of light?
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In the famine world, danger comes not only from food shortages, but also from evil spirits and beasts, and even humans themselves.
But it's not a big problem, because Yang Chen has awakened the ability to upgrade items.