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

Mark went on clicking a black-colored button.

*Ding! The skill, Trident Missile, was activated. 414,252 Ether points were deducted.

*Ding! Please lock on the target.

Because of all the flames ahead, it became a little bit harder for Mark to lock it right away, but without any intervention from any enemy, he comfortable took his time to do the task.

Once the target was locked, the three launchers absorbed natural energy from the surroundings at a terrifying pace, alerting all the Supreme realm experts within the 30 km radius.

Just like others, Lan Ju and Tang Jiyao also sensed the surge of power just a couple of kilometers away. They put a pause on their battle for a moment. The strangest thing for them is that the power isn't coming from a human or a beast. It was from a non-living thing.

Battle for the seed of fire (part-3)