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

After the two of them left the store, Mark sent a message to Alina to return to the store. He then transferred all the gold coins to his inventory. "634 thousand gold… Damn, I feel like a billionaire."

Soon, the store was closed and Mark went upstairs and sat on the bed.

"Okay, there's around 20 minutes before my body gets too weak due to the after-effects of the advancement pill. This is the perfect time to use it."

As the familiar lottery wheel appeared before him with a timer, 4 days 15 hours left till the next try.

There were only three options left to choose from. Upgrade stone, Unique Skill, and Random Bloodline. The remaining 18 were empty.

Mark clicked and held the lottery ticket image for a couple of seconds in the inventory.

The lottery ticket disappeared and the remaining empty spaces disappeared, leaving behind the three.

Bloodline of Blizzard Pegasus