There's Something Wrong With These Demonic Women! - Chapter 3: I’m Just After Your Body

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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“I hesitated before, I turned back to face my shred of hope, yet still no one cared.”“Later the thick fog arose, you said you loved me so much, but why is your love even fainter than the fog, so faint that I can’t even see it clearly.”

My method in getting stronger is very simple—eating.I just need to eat artifacts.I've regressed, so I'll be able to eat as much as I want now, right?

The protagonist travels through Shu Mountain and becomes a demonic dragon guarding the heavenly book in Dinghu Peak.