Warlock of Oceans: My Poseidon System - Chapter 490: Sixth Floor: The Chamber of Seven Seas (11)

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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What happens when a scientist from a futuristic world reincarnates in a World of Magic and Knights? An awesome MC is what happens! A scientist’s goal is to explore the secrets of the universe, and this is exactly what Leylin sets out to do when he is reincarnated. Dark, cold and calculating, he makes use of all his resources as he sets off on his adventures to meet his goal. Face? Who needs that… Hmmm… that guy seems too powerful for me to take on now… I better keep a low profile for now. You want me to help you? Sure… but what benefit can I get out of it? Nothing? Bye. Hmmm… that guy looks like he might cause me problems in the future. Should I let him off for now and let him grow into someone that can threaten me….. Nahhh. *kill*-

Alternative: Leylin is transported from an advanced technological era into a medieval world— except there’s magic. Equipped with “only” his quick wits and an A.I. chip fused to his soul, he sets out to become the most powerful magus the world has ever known. In a land divided into the Light and Dark Magi, the weak can either be cattle or disposable slaves. Only the strong can determine their lives, and only they have the luxury for virtue. Yet strength is only a tool for Leylin, like any other. His goal, in the end, is his own.

“Your stats are lower than that of your average person.”

The weakest by a mile among the otherworldlers of class 1-A, Takatsuki Makoto.

The Heroes and Sages who had cheat skills in his class had went off, and the base set lifespan is 10 years?

The Great Demon Lord is going to revive soon?

I am a Mage Apprentice?

Isn’t the balance way too bad? This damn Isekai is a tr*sh game!

“Want to be my believer?”, the Goddess that told me this has zero believers!

Aah, this is bad…I don’t think I can clear this. The Goddess with zero believers is an incredible beauty, and she is telling me she is imprisoned somewhere and is waiting to be saved. My last and hardest mission is to save the Goddess.

Clearing this Isekai that only has adversities, the story of the weakest mage.