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

He walked toward the ice wall and then closed his eyes, raising his hands. Bright flames escaped his palms and took the shape of a large bird before rushing toward its target.

In the impacted region, ice slowly started melting. Some of the ministers who were in Shang Wei's support were impressed by the bloodline skill.

They were about to praise him but the melting ice recovered its solid state once again, throwing everyone into despair once again.

Shang Wei turned around and looked at his father, "Your Majesty, if you and I work together and unleash our bloodline skills, we could open the way."

Shang Fu nodded immediately, "Alright."

Soon, as the others backed away, the father and son duo unleashed their respective bloodline skills of the same type.

"Bloodline skill: the Arc of Inferno" "Bloodline skill: the Arc of Inferno"

Xia Dynasty's terracotta army