My Evil Boy Toy - Chapter 3: Beat

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

Transmigrated to become a disciple of the demon sect, relying on the technique modifier to become a giant of the demon path.

[Detected the technique “Blood Nerve”, relying on devouring blood to cultivate]

[Side effect: easily affected by the spirit contained in the blood, becoming bloodthirsty, murderous, insane, and even brain dead]

[Please wait, system modification is in progress…]

[Ding! Modification completed and side effects canceled]

After transmigrating to the parallel world of Blue Star, I, a top influencer, being exposed of having multiple girlfriends?Awakened a system, and the system has a kind of performance card prop which, when used, directly adds to performance?Fans:“Haha, it's good that this dead scrub was exposed, such a person should fade into obscurity!”“No way, how did this dead scrub's album break nine million sales, are you guys sick? You drop your fandom yet still buy his albums?”“What, the dead scrub's online store exploded in sales? It's all fans buying? What kind of crazy fans are these, get out!”“Ah, he broke five billion in box office now? The industry is buzzing about his fans being the top in breaking ranks?”“What happened to swearing off being fans and blacklisting him for life? Is this your idea of blacklisting!?”

The moment when mercenary leader Kwang Hwi receives video game like abilities, the world is suddenly thrown into chaos. A thick fog envelops the Earth, bringing with it savage, otherworldly monsters. At the same time humanity has been rendered defenseless against this onslaught, as the strange fog turns most weapons to rust. With mankind spiraling towards oblivion, it is up to Kwang Hwi, with his new abilities, to save the world. Watch as Kwang Hwi leads his militia and becomes the last bastion of humanity. Will he be this world’s savior, or its conqueror?