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

Meanwhile, at the Auction House, Xin Rui revealed the properties of the pill in her hand, "This pill is from a trusted source but we cannot reveal its origins. However, what we can tell you is that swallowing this pill will raise your cultivation level by one, permanently. Even a legendary realm warrior will become a supreme realm expert just by swallowing this pill. There will be no wall, side effects, or whatever.

But the catch here is that it only works on those professions that work on magic, such as Mages, summoners, Dungeon creators, etc…

The best way of using it is to give this pill to a peak stage legendary realm Mage so that he/she becomes a Supreme Being instantly.

Please do note that this doesn't work on Supreme Beings or above realms, not that it is worth mentioning but still…

The Grand Auction (part-13)