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.
***
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.
**************
Author's current works: War Online, My Soul Card is a Reaper
Author's other notable works:  The Last Slytherin, The Sharingan Hyuga
**************
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

*Ding! You can expand the interior of your store or add new chambers as you wished in exchange for gold coins.

*Ding! Note: The exterior of the store and the appearance will not be changed.

"Okay, that means I don't need to move out to a bigger residence." Mark's eyes lit up in excitement. Along with the suppression, the interior expansion will certainly improve the fame of his store.

Feeling that he had enough gold coins in his inventory, Mark clicked on blueprints.

Several blueprints containing the plans, preview images with different dimensions, and prices appeared before his eyes.

The starting one was the cheapest with 100 gold coins.

Renovating the store & Visiting the Swordmasters Guild