I Came From The Mortal World - Chapter 18 - Enlightening Remarks

Outer Sect Disciple Chen Yu, assimilates within his body a fiendgod heart.The heart, is the backbone of life, the human body’s fatal vital point. And it can be said that Chen Yu’s heart is actually his strongest defense point, and permits him to overtake demonic beasts, or divine beasts unlimited potential.Henceforth, he steps onto the stage and surges forth on a magnificent scale, in a heart-rending mysterious journey.Talented as a cloud, an unparalleled supreme talent.10,000 races glorious, cross boundary battles.Only my heart, eternal!

Three Days of Happiness is a novel by Sugaru Miaki, also known as Fafoo. It’s a rewritten version of the story originally posted to 2ch.

The premise of the story revolves around a shop where one can sell away the remaining years of their life, and the consequences of doing so.

“I Say A Little Prayer” is a short related story which was posted along with the novel’s release. It spoils some things about the main story, but nothing major.

Shen Mo transmigrates into the body of an outer disciple of the Qingxuan Sect, once the brightest among his peers. Just as he is on the cusp of entering the inner sect, his foundation is cruelly destroyed by poison. At his lowest point, Shen Mo discovers an extraordinary ability: the power to see and seize the fated opportunities of others.Are you a powerful reincarnation destined to acquire a Heavenly Tier technique? I'll take it!Are you the future Flame Emperor, refining the essence of the sun? That power is mine now!Are you a descendant of the Martial Ancestor with a Heavenly Tier spiritual weapon? Hand it over!Are you the sacred maiden of the Fox Clan, about to tame a sacred beast cub? Both the beast and your opportunities belong to me now!“My fate is in my hands, not others', for I am the CHAMPION OF DESTINY.”

Yin BiYue has made the worst purchase ever. After transmigrating countless times into the bodies of canon fodder villains, he buys a ‘Fiend Halo’ from the Rebirth Company, supposedly the best aid for an up and coming final BOSS!

He’s ecstatic to finally get a villainous role where he won’t die after just a few lines, if any at all, and is raring to become the best opponent a protagonist will have… However, why was everyone looking at him with pitying eyes? Why was the protagonist rushing over to help him get out of his crimes? Most importantly, why was his ‘Fiend Halo’ just making things worse?!

Meanwhile, the intern salesperson at the Rebirth Company discovers that he might have accidentally sold a prototype White Lotus Halo to a certain villain…

- Description from Novelupdates