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

Five minutes ago;

Alina was operating the attack helicopter while Mark was busy creating the missiles.

Type: Air to surface

Price: 10 ether crystals (low) / 2 Ether crystals (mid)

Description: An air-to-surface missile with the capability of reducing the enemies with (advanced stage) 7-circle realm or lower rank to nothing.

Creation Success rate: 25%

Note 1: The attack cannot be dodged once the target is locked. The missile can chase the target for 6 km.

Note 2: The missile cannot target the enemies who are flying 50 m or higher from the ground.

Note 3: There should be a minimum altitude distance of 100 meters between the attack helicopter and the target.

Target lock is the Missile's strength and its weakness