You're Just My Ex-Husband,My Lord - Chapter 250-bert

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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He didn’t want any part of it.He wanted to be independent.He didn’t want to become a side character in the story of some so-called protagonist.Yet, Mo Zhiran couldn’t run.Heaven wouldn’t let him, for he was an extra destined to die for the rise of the protagonist.An expendable nobody, unnoticed and forgotten.In the end, Mo Zhiran was betrayed by his own clan brother just to save a girl who appeared out of nowhere. Worse, before his inevitable death, he even had to block the danger for that same brother, unwillingly.He was basically a Redshirt.“Haha… Heaven is so unfair.”Zhiran hated them both to the core. If he got another chance, he swore he would make them pay a hundredfold for every drop of blood he spilled.And fortunately, he did.Reborn with an unusual system in hand, Mo Zhiran would no longer be a disposable extra.This time, he would carve his own path, one step at a time.Even if it meant being forced to be a Villain.

As the last abyssal demon in the world, Wen Long was pulled into various worlds to do tasks by a guy who claimed to be a system. The goal of her mission was to save those villains who had been blackened for various reasons…

- Description from Novelupdates

After rebirth, Long Xiaoyuan went into raptures because he was in poor health in his previous life. However, he suddenly found that his soul was in the body of a fatuous and self-indulgent emperor.

This fatuous emperor put sycophants in important positions while executed the faithful and the upright!

This merciless emperor married the son of a general and kept torturing him!

How could he be reborn as such a person?

The empress was pretty handsome and smart. Since the former soul of the emperor didn’t cherish such an excellent man, Long Xiaoyuan would love the guy and save himself by the way!