MTL - Marvel: Anime Extraction - Chapter 21 portal

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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[WARNING]****** /THIS NOVEL CONTAINS EXPLICT SEXUAL CONTENT, CURSE LANGUAGE **** * ** ******* * **** AUDIENCE DISCRETION IS ADVISED“I’m in a relationship with a stunningly beautiful and irresistibly alluring girlfriend, whose charm and grace are unmatched. Winning her heart wasn’t easy, but I thought she was the embodiment of virtue and innocence. However, one day, I discovered a side of her I never anticipated—through our apartment window, I saw a connection with her ex that left me in disbelief. I never would have guessed she could have such a hidden side.”[A/N][this isn't a fast-paced novel, so for all those looking for an early revenge it's not coming now, it's just a casual novel read if you like it]

Her parents died in planned accident by her uncle. They used her in every way they can. They planned to sue her so she wont take her fathers company back. They want to destroy her life making her penniless. No one knows that she is the not the same girl who was played as puppet in their hands. Five years changed her a lot. Now she is a hidden genius still acting pityfull to take revenge.

I never thought I had meaning to my life, but I guess I have a talent too.

「Get ready. The duel will begin soon.」