After Transmigrating as a Demon, I've Been Adopted by Angels! - Chapter 109 - Davis, Could it be That Mysterious Person?

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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A Wicked Witch, trailed by vengeful spirits and curses.“Hey, Tin Can! Did I not tell you to stop causing trouble?!”A Courageous Lion, descended from the bloodline of a hero.“Uh, no matter what, this seems like a bit much, no? Huh? Whatever doesn’t kill you only makes you stronger? Um, Sir Knight? Sir Knight!?”A Scarecrow, sealed away for pursuing the taboo.“Despite appearances, I’m quite capable from the shoulders up. Below that, you say? Let’s see, if I had to give a cold self-assessment… perhaps an emergency shield?”A Solitary Tin Knight, forever barred from human warmth.[The ‘Tin Knight’ urges everyone to initiate the boss battle, saying the cut scene is over!]This is a cruel, fairytale-like adventure story told by twisted protagonists.…Maybe!

With divine medical skills in his left hand and supreme martial arts in his right, carrying a century of memories, he was reborn and returned to the city. This life, he vowed to dominate everything, take control of all, and ascend to the zenith of the heavens!