Eternal Holy Emperor - Chapter 780 - 723: Gray Dragon King

Word went around that no one that had ever knocked on the esteemed Eleazar family’s doors seeking shelter were turned away.Fleeing the prince of Lustris no less, Arabella Sterling held out hope that those weren’t mere rumors as she crossed the border over to Umbraria, home to all creatures of the night. A land where noble blood like hers was a highly coveted delicacy.As such, she wasn’t turned away, but since the Eleazars ran no charity, Arabella was compelled to become the sole blood provider to the heir of the family in exchange for safety.Though never, in a million years, did she imagine that what had started as a simple trade off, could morph into a swirl of tangled passion when the cold and stoic vampire she served showed interest in the young woman beyond the crimson nectar coursing her veins.

It begins on the mountain.

With the glint of a knife, a flash of steel in the hands of a sworn brother. A betrayal.

Stabbed and pushed down the mountain, Zi Chen lied within the red-stained snow, left to die.

This is where it begins; he is given life by lightning,
baptized by thunder.

Those who had once betrayed him should all suffer in his cruel revenge.

- Description from Novelupdates

As an ordinary human being on the earth, Tang Long was brought to the Cultivation World by a lost immortal, and relying on his amazing talent, he made it to one of the five emperors in that world. However, struck by Thunder of Nine Heavens, he lost his life. It was lucky for him to transmigrate in the human world in an intern who was named Qin Haodong. With his excellent medical skills, he became a divine doctor of traditional Chinese medicine and encountered the baby girl he made before going into the Cultivation World, whose mother was as pretty as a fairy. The little girl even asked him to find more lovers. What a cute girl…

A series of short stories in the world of Toaru Majutsu no Index organized into chapters featuring Kanzaki Kaori as the protagonist, going around the world and space doing missions for the Church of Necessary Evil, however, there is more than meets the eye as each incident is connected.

One chapter was bundled with each limited edition release of the Toaru Kagaku no Railgun anime DVD and BDs, with all of them together being equivalent to a single normal Toaru Majutsu no Index volume