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

*Ding! You accepted the hidden quest.

*Ding! You opened the credit limit system. 150,000 credits added to the limit.

*Ding! You unlocked the Unique Weapons category. Everything except the Unique Items section has been locked.

*Ding! Platinum-grade purification stone was purchased. 50,000 credits were reduced from the credit limit.

*Ding! The purification store was sent to the inventory.

*Ding! Your remaining credit limit is 110,000 credits.

Mark took out a brightly glowing stone and inspected it.

Purification stone

1) Removes all debuffs from the target.

2) The target can be a living or non-living thing

3) Removes any type of seal on the target as long as it is of General grade and lower.

Unlocking Space Attribute