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

The entire arena fell silent for a few moments. Mark not only defended himself but also indirectly insulted the nobles and even the Emperor wasn't spared.

The second prince felt like Mark shouldn't have said that. If he knew his father well, it is going to enrage him. He couldn't help but be worried that this new future partner is going to be punished.

The third prince narrowed his eyes. He finally understood what Mark was trying to do. Now the Emperor can't even punish Mark for speaking the truth or else, it will only prove that Mark is right. "Damn, he knew how to use the situation to his advantage."

Song Yue started to get worried when she heard his statement. Lin Xue just thought that he was spouting some nonsense to cover up his crimes.

The public trial (part-3)