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

The Patriarch of the Wuji sect is an advanced-stage Supreme realm expert and his strength was no less than a supreme being, well, atleast in his opinion.

He neither fears the Xianshu sect nor did he care about the authority of Emperor Qin Mo.

This was why he didn't bother to hide his animosity against Lan Ju and his companions. As for the reason, well, it can be guessed by anyone who watched Mark's battles.

In his very first match itself, Mark killed a talented individual from the Wuji sect while representing the Kunlun sect. Throughout the tournament, he also showed his overbearing attitude with everyone from participants to the elders of the sect.

Obviously, he would want to take revenge. But, he cannot act on his own as Mark also had a supreme being as backing. And it's not worth offending such a figure over a disciple who didn't have any personal relationship with him.

Hence, he can only hope for Mark's death within the competition itself.

Dragon Warrior Tournament (Quarterfinals)