Snowstar

Mark is a genius military weapon designer who was kidnapped by a mafia gang after refusing to work for them.
They forced him to design unique weapons for five years, until one day he successfully escaped only to get shot by his trusted comrades.
*Ding! You awakened a weapon system.
When he opened his eyes, he was in a different body and in a different world.
"You want to kill a wild boar without being detected? Forget about bow and arrow. Here, I present you this sniper rifle."
"You want to kill a horde of goblins from the sky? Forget about those flying carpets and brooms. Here, I present you the fighter jet." 
"You want to kill a dragon? Forget about taking the help of the S-class adventure team. Here, I present you a nuclear bomb."
Join Mark Spencer/ Lu Zhen as he brings the whole world to its knees with the help of his weapon system.
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Note: Author isn't born in an English-speaking nation and has no editor either. So, please be understanding if there are any grammatical errors.
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Author's current works: War Online, My Soul card is a Reaper
Author's other notable works:  The Last Slytherin, The Sharingan Hyuga
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You can also support the Author through Patreon

https://www.patreon.com/snowstar

Weapon seller in the world of magic

After the court session is over, Shang Bo went to the Emperor's chamber to meet his father to report the investigation results as 2 days of time were finished. Unfortunately for the Emperor, Song Yue's location hasn't been tracked yet but received a shocking piece of news.

"Minister Song deceived me?" The Emperor flared up in anger upon hearing that the ransom note that Song Yun presented was a fake and Song Yue wasn't abducted but ran away on her own. He might be disappointed with this fourth child of his, nevertheless, as a father he trusts him. However, he was also an Emperor who can't take his word for granted.

So, he said sternly, "I'm going to summon Minister Song here and ask him directly. If he doesn't apologize and stick to his earlier words, then, you will have to prove yourself innocent. Or else, you will be punished for giving false information to the Emperor."

The first mass produced modern ether weapon