Legend has it that during the Heian Kyo period there was a demon fox named Tamamozamae.
Her beauty and intelligence coexisted, causing peace in Ping An.
Before her identity was revealed, she was the emperor's most beautiful concubine and his favorite woman.
When her identity was exposed by an onmyoji named Abe Seimei, she transformed into the form of a demon fox and wanted to use force to directly destroy Heian Kyo.
It's a pity that the onmyoji named Abe Seimei was very powerful. After fighting with her for a day and a night, the demon fox died of exhaustion, and her demon core was made into a demon sword, named Fairy Tail.
Anyone who uses this knife will gain unprecedented power, but this power harms people's hearts and turns people into monsters. If someone with a firm mind uses it, the Taoist heart will be broken, and the sword will never be used again in this life, and there will never be peace in this life. If someone with evil thoughts obtains it, he will be captured by the consciousness residing in the sword and continue to cause harm to the world. Therefore, this sword was eventually sealed due to its powerful power, but it disappeared for thousands of years. (I just added a setting, how to write it specifically? I haven't thought about it yet, I will write it after I think about it)
Intention: hope