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 or buy coffee on Ko-fi.com

https://www.patreon.com/snowstar

https://ko-fi.com/snowstar5061

Weapon seller in the world of magic

The next day, early in the morning, the Emperor learned of the matter as soon as he woke up and decided to stop leisurely traveling on a long route, teleporting to the Imperial Palace along with the second prince and Bai Xun. Song Tai went on his way toward his home.

Without wasting any time, he summoned all the ministers to the courtroom to discuss the matters of the powerful energy explosion, which occurred not so far away from the Imperial City where nearly 3.5 million citizens were living.

Of course, the deaths of four thousand villagers also cannot be ignored by the Emperor. However, as he doesn't have the strength to apprehend those criminals who were probably Demigods from the legends, all he can do is provide compensation to the direct family members of the victims.

The second prince's pending order