MTL - Phoenix Against the World - Chapter 2 : Crossing [2]

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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Reborn in the Naruto world, Shin Uzumaki finds himself in the doomed Land of Whirlpools. As a member of the Uzumaki Clan! Trapped in a world filled with war, betrayal, and unimaginable power, Shin’s survival seems impossible.. Until it isn’t!![Ding! Replication System Activated!][Daily Login Reward: Common Replication Card.]​​​​​​​[Newbie Gift: Perfect Sage Body—​​​​​​​Adamantine Sealing Chains​​​​​​​—​​​​​​​​​​​​​​Four Symbols Seal​​​​​​​]With the power to Copy any Ability—whether it’s the Kekkei Genkai or Rinnegan or Forbidden jutsu—Shin begins his journey to dominate the Ninja World. [First task: Save Kushina and prevent the destruction of the Uzumaki Clan.]

The world has turned into a hell, a place where the strong thrive!

He Zening had always felt that novels depicting the life of a Company President were good for passing time, but insulting to the IQ. Still, having read countless novels of this genre, never did she imagine that someday she would transmigrate into one of them. To make matters worse, the plots were so similar that she could not remember which novel it was. She was left with no choice but to assume the role of a secretary to the President.

The secretaries in novels ran errands for the President, assisted him in pursuing women, helped him keep the flames of love burning, and even took the blame for him if necessary. But a real-life secretary? They were blamed by those in power, sometimes hurt and reprimanded wrongly.

If it were not for the excellent pay and necessity, she would have already bolted out of the door. And like all curious bystanders, He Zening wanted to see the plot happen before her eyes; the President meeting the protagonist! A villain standing between the love of the leads! The side characters!

This is the second life of a level-headed, diligent secretary working hard to achieve a carefree life, whilst being dragged into the plot.

- Description from Novelupdates