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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Weapon seller in the world of magic

In a private chamber of the Imperial Palace, the Emperor was having tea with the Grand Secretariat. It was a common practice for both of them after the morning session of the court.

Letting out a sigh for the umpteenth time, he said, "I really don't know who to pick as my successor. One is too weak in strength to ascend to the throne and the other one is not only depends on his allies too much but is also sly in nature.

And these ministers aren't helping the situation, either. At this rate, my children will probably go through the same thing as me. Can't those brats give me a comfortable retirement?"

"If you ask me, your majesty, then, the one that has no desire for the throne is the one that is eligible to sit on it. I'm not saying this. It is what the ancient scholars said." The Grand Secretariat Li Zhen Kang replied to him in a roundabout way.

The Emperor wishes to retire