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

Concentrated energy in the form of golden-colored lightning cut through the air and struck Mark but didn't leave a scratch on his exo-suit.

The whole arena was silent, including everyone in the VIP Box. They just couldn't believe their eyes.

Just like what Mark prophesized at the beginning of the battle, he didn't move from the spot, and neither did he attack her. He didn't even use any ether energy to protect himself. But, he was completely unharmed.

On the other hand, Xie Mei appeared to be quite exhausted as she used so many powerful skills that shook the hearts of the spectators against her opponent only to find out that all of them were useless and none of them could break the defense of the Exo suit, which has 9 points of stats. One can say that she was actually attacking a Supreme realm expert who has trained his body to the peak.

Dragon Warrior tournament (semifinals-2)