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

Using their stealth skill, the three assassins turned invisible and exited the bushes without making any sound.

Lin Xue couldn't see them but their invisibility appeared to be useless against Allen. Maybe, it is because Allen was at rank 5 and their realm wasn't higher. He spotted them right away and informed his partner, "Sister Lin, your 2:14, 4:31, and 10:17."

As soon as she heard the words, Lin Xue closed her eyes and stabbed the sword into the ground, unleashing her most powerful skill.

"Ascent of the lightning."

Upon consuming her ether energy by nearly half of the maximum, the sword released the energy into the ground, creating a seal that covered over 20 meters of her surroundings.

Using a clock as the reference, she then imagined the positions of the targets as her partner mentioned earlier and attacked them.

Lin Xue and Allen's first quest (part-3)