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

https://www.patreon.com/snowstar

Weapon seller in the world of magic

Alina threw the kid in the back and stepped inside the pilot chamber.

The attack helicopter slowly rose in the air and flew towards one of the portals. After it gets inside, Mark tried to communicate with her through the system.

*Ding! Alina replies that she can hear you.

"Okay, connect me to Alina's vision." He said to the system.

Soon, a holographic screen appeared before him. Mark saw a sleeping giant dragon, which is as big as the statue of liberty.

Thinking about the dungeon break, where all the generals of the beast king were the same beasts, he expected it might be a dragon. Of course, the other possibilities weren't put away either.

Mark took out the advancement pill and swallowed it.

*Ding! Select the stat you wish to increase temporarily.

*Ding! Your intelligence stat temporarily has been increased by 1.

*Ding! You temporarily reached rank-6.

Taming a Beast King (part-2)