MTL - Resurrection of Reiki: I Will Win Every Bet - Chapter 243

The main character is reborn as a character from a game he played in his previous life. This character falls into ruin along with the villainess, spending the last of their years together. A man named Kururi Helan.

Nan Yu was brought by the Nan Family back from the countryside to pretend as the fake heiress, being forced to marry the paralyzed and tyrannical young master of Huo Family on behalf of the real heiress.Before the marriage, she was just a fake heiress who had been abused since childhood, despised by everyone, and had nowhere to call home.After the marriage, she became the heiress who was coveted by many, lavished with love, and had countless brilliant hidden identities.Such a perfect person, the only pity was having a disabled husband.Everyone advised her to kick him out and find someone better.But a few days later, they saw the man who had been in a wheelchair stand up and become the rich and powerful ruler of the Huo Family.He then pinned Nan Yu in a corner, held her by the waist, and with a hint of red in his eyes, and said, “Sweetie, I heard that you want to divorce me?”Remembering his wildness in bed, Nan Yu shook her head violently, “No! Those are all rumors. You are the only one I want to spend my life with!”

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

[Invincible Shuangwen] The end times 200 years later.

Lin Xinghai obtained the system, ran rampant in the apocalypse, and crushed all enemies.

Rolling is cool for a while, and rolling has been cool all the time.

Ding! Gain blood power +1

Ding! Gain Genetic Optimization +1%

Ding! Gain firearms skill proficiency.

PS: The creativity comes from the spirit cage.

- Description from novelbuddy