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

It was the time of the day when the sun was almost at its peak position.

Mark, Song Yue, and Song Yun finished their lunch together and the former started talking about his plans for their next destination.

Meanwhile, the manticore was sleeping, as usual, the anaconda continued to coil itself around the mountain and keep an eye on the ocean, and the demigod realm beast, Lan Ju, on the other hand, was babysitting the golden-furred kitten.

The Zheng and Tishanan were of the same species and shared a common ancestor. Hence, it didn't take long for them to bond. Not to mention, the kitten was also of beast emperor grade.

As a result, Lan Ju became its teacher and tried his best to train the junior.

For the past few days, he woke up the little kitten early in the morning and made it run ten laps around the perimeter of the island as a warm-up.

After that, Tishanan will tag along with Lan Ju as it goes into the ocean to catch some beasts.

Tishanan's breakthrough