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

Description: The remnant powder is made from depleted ether crystals. It is used to make ether weapons according to the quality of the powder.

Price: 10 silver coins per gram (copper); 1 gold coin per gram (silver); 10 gold coins per gram (gold); 100 gold coins per gram (platinum); 1000 gold coins per gram (diamond, ruby, Crystal); 10k gold coins per gram (Mithril); 100k gold coins per gram (Celestial); 1m gold coins per gram (God);

"Seriously? The ether firearms could be made from those worthless things?"

Mark always thought that ether weapons are made from high-quality metals and blood or any part of a spirit beast. So far from his inspection, he concluded that way.

The Seed of Fire