MTL - Rebirth: Degenerate Slave Abuses Tyrant - Chapter 411 is not chaotic

A broken man who ended his own life finds himself reincarnated into the game he used to play. However, instead of becoming the protagonist or a powerful antagonist, fate places him in the role of a minor villain—a mere stepping stone for the protagonist in the game's first arc.

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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“...is that the end for me?”His eyes closed, accepting his fate. He thought it was the end. However, it was not.When Liam awoke from the endless darkness, he found himself in a world much different from his own―and in a body that was unfamiliar.“...[ The Golden Hero ] This is...”It seemed that he was given another chance at life. No longer as Liam, but as Rowen, a character from a novel.But, there was a slight problem.Rowen was a villain. A secondary villain at that.His fate was to be manipulated by the antagonist and killed by the hero.It was a tragedy. What could he possibly do?Of course, not wanting to let fate decide for him again, he took up his arms, stopping at nothing to prevent his tragic death.He had to survive in a cruel world where fate was not in his favour.If it meant killing the protagonist, the crown prince or even the main villain; he would do so.All so that he could live the life he wants.

'Death' It was meant to be the end, but it brought a new start.After a destructive nether storm consumes his world, Jack finds himself face-to-face with a powerful being who tasks him with a mission he can’t refuse.Reincarnated as Asriel—the most tragic, doomed character from a novel he once read—Jack’s frustration grows: “Damn it, why this fool?”Now, he must navigate Asriel's cursed life, facing relentless supernatural beings that threats him with a single hope:[Necromancy System Activated!][Ascend as the Ruler of the Undead!]But can Jack rise above Asriel's fate, or will he, too, fall prey to the shadows lurking in his new world?