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

The release of a hundred times gravity in the surroundings forced Mark to his knees and before he got to counterattack, Mark's copy charged forward like lightning and gave a kick to his chin.

"Gravity Dome, activate." Mark hollered at the top of his lungs to hinder his copy's movements and also hoped to be free from the suppression.

However, the result was a failure.

"Why?" this was the thought of Mark as his vision blurred while the kick was connected, sending him fly away tens of meters backward. Pain radiated from his chin and blood trickled down his lips, but he gritted his teeth and tried to push himself up, with his muscles straining against the crushing gravity. However, it was to no avail, for he could only barely lift his head.

When his eyes met his copy, the latter was seen smirking, "Is that all you've got?" the copy taunted him further.

The trial of Yuanlong (part-2)