The Forsaken King - Chapter 2: The 13th Son

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

When not THE Apocalypse strikes, but all of them together, where will you be? What will you do?

As Humanity faces its hardest time a playful god shows mercy(?)

Follow Seth on his journey to somehow survive in whatever has become of his world.

Also posting on royal road.

The ordinary yet not so ordinary detective, Wen Wen, woke up in a mental hospital and discovered that his right hand was connected to a mysterious space called the 'Catastrophe Containment Facility,' from which he could acquire the powers of the monsters imprisoned within!By capturing a vampire, he gained a formidable physique;By capturing a ghost, he could turn invisible and pass through walls;By capturing a fox spirit, he could charm the opposite sex...In short, in order to obtain more powerful abilities, Wen Wen began to diligently capture monsters, thereby stepping into the strange world of superpowers and seeing the hidden truths behind the curtain...

The unparalleled Demon King Ye Xuan, who was able to heal the death or the living alike and holder of the medicine Holy Scripture, was betrayed and killed by his fellow Demon Kings. But he reincarnated into the body of Ye Xuan, the prodigal son of the Ye family and vowed to himself that he would return to his peak and take back everything that belonged to him!

- Description from Novelupdates