the gods biggest mistake: the immortal mortal.

In the beginning, the gods of origin Izanagi and Izanami had been given a task to fill the world with life since immortal beings were forbidden from having children of their own the creation of humans was brought about.

At the start of the world when humans were just making progress a single human whose life wasn't turning out so well decided to insult the gods for his lack of good fortune.

Izanagi and Izanami did not take kindly to the insult of not being able to reproduce and cursed the humans' existence. Now this curse wasn't like other curses.

And this mortal's trade was in blacksmithing so the gods cursed him with immortality and the painful experience of changing genders between man and woman every 100 years.

Forced to watch his loved ones die of old age while he was stuck in a constant state of being 24 years old forever he learned many skills, and techniques, and found out that with his curse came a surprising gift. The ability to breathe purple fire.
And the destructive powers of a dragon.

This man's identity remained mysterious to everyone throughout history but only one name always came up when mentioned in legends and tales of conflict and shinobi

Dragon Sama.
However, there was also another person whose authority in the eyes of the deities was highly respected.

He went by the name Obsidian and he was responsible for recording and documenting everything that happened within the world the gods created. His powers were unknown but at the same time very similar to those of the kitsune.

Obsidian carried with him several scrolls each one a historical account of humanity's progress and advancement.

With the simple stroke of a brush and a snap of his fingers, Obsidian could either save a mortal life or make it hell if the gods ordered it. But because dragon Sama had a divine curse placed on him he was immune to anything Obsidian attempted to make happen. After all, how do you kill the unkillable???. The simple answer, you can't.