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

Being high-level warriors, their reaction was instant. The little princess controlled the inanimate bird to get away from there. The old man also moved away, thinking that it was aimed at the beast. Meanwhile, the overlord pushed its legs against the ground and jump high.

Surprisingly, they saw the heat warhead projectile change its directions like some kind of fireball spell that locked onto Pan Enlai.

It was also too fast that didn't let him try dodging away. He was left with no other choice and poured ether energy to power up his body just before it reached him and detonated, creating a powerful explosion enough to blast away the free-falling Taslan.

The Elder crashed onto the ground with heavy injuries. Taslan's legs were slightly injured but it healed itself pretty much quickly and stood up its feet.

Dungeon of Taslan (final)