From Idler to Tech Tycoon: Earth - Chapter 234: Bitter End

As a student, Lin Li suddenly owns a system and he expects it to be powerful enough to make his life better. However, unlike systems he has seen in novels, this system is so random.[Quest Triggered!][Quest One: Slay ten Little Demon Heaven Blood Crows that frequently attack and kill villagers around your village.]“How could I find these Crows in a modern society? ”An oblivious mosquito with an annoying buzz flies over and lands on Lin Li's hand.“Snap!”[Killed Little Demon Heaven Blood Crow (1/10).]“Eh?!?!”

Euri was quite passionate about wanting to become a perfect corporate slave.But after being forced to explore the sentient game infesting his miniscreen, Euri realized that he had stumbled upon an opportunity anyone on the planet would kill for. While the entire human civilization on Planet Nen struggled to deal with the superior lifeforms plaguing the extraterrestrial planes beyond their world, Euri could compete with them all for power by just playing this game!A side-gig that didn’t conflict with his dream of climbing the corporate ladder—how generous can fortune be to bequeath this opportunity to him.Transcending the spatial laws, transcending human notion of cultivation, transcending the rules of Cosmic Development Bureau, Euri began a series of crazy experiments that could perhaps destroy the millennia-spanning schemes of the most advanced civilizations controlling the macrocosm.When interrogated about this fiasco, Euri answered the way a perfect corporate slave should. “Full credit for this goes to my boss, who provided me with the opportunity...”

Jiang Xinyu transmigrates into the 1950s without parents. In a time of famine with nothing to eat?But she just wants to live the life of a happy-go-lucky slacker...So she has to roll up her sleeves and fight!Carrying space, full of blessings!Heaven's favor, what you think is what you get.While others starve, she gains weight, determined to live out the luck she didn't have in her previous life.

He is a young man without a spirit root. It is believed that this denies him the chance at cultivation. However, a mysterious lady imparts a Supreme Demon Classic to him and from then on, he starts his path of cultivation.
He undergoes a total transformation to emerge as the most fearsome and powerful fiendish demon in his era, that even immortals and fiends are fearful of him, and saints are at his beck and call.
Mastering the Supreme Demon Classic is the turning point in his life. He is able to unleash his immense and divine power from within, illuminating the entire universe!

- Description from Novelupdates