I Sold Some Weapons, and a Level Nine Civilization Lost Its Cool

Qin Hao transmigrates into a sea of stars and obtains a game interface.

As the experience required to level up keeps increasing, Qin Hao starts making use of his class specialty and embarks on a journey of selling weapons he has made himself.

Whenever someone uses a weapon he made to kill a living being, he can sit back and gain a huge amount of experience.

But...

Surface civilization: "I only wanted to buy materials for controlled nuclear fusion and join interstellar society. Why did you sell me a planet-destroying battleship, Mr. Qin Hao?"

Stellar-system civilization: "I only wanted to buy a star gate connecting several stellar systems. Why did you sell me matter-antimatter annihilation weapons, Commander Qin?"

Galactic civilization: "I only wanted to buy a hyperspace engine for exploring the sea of stars across tens of millions of light-years. Why did you sell me a black-hole-armed space station equipped with a hyperspace engine, Chairman Qin?"

Just as Qin Hao is preparing to sell weapons that can alter the constants of the universe, causality weapons, and more...

Super-galactic civilization: "Chairman Qin, could you please show some mercy and leave this hard-won peaceful sea of stars alone?"

This novel and its characters are entirely fictional. Any resemblance is purely coincidental. Do not imitate.