The name of this article wasn't revealed in the novel and instead was given by editors of the wiki as substitute for lack thereof.
After Min Ren started cultivating, he was unwilling to part with these blades; he always had them with him. Even after he became an Immortal Emperor they were still by his side. Every time he reminisced, he would take out the blades and caress them as if he wanted to share his feelings with the blades' soul. With time the blades absorbed part of his consciousness and power and were transformed into an Emperor's Possession.
After Min Ren's death the blades were placed into the Cleansing Incense Ancient Sect's Weapon Armory. They were attached to the statue of the "Crow God" where they rusted for millions of years unnoticed by everyone.
- In some chapters (for example, Chapter #0091) the blades are incorrectly refered as Invisible Dual Blades, but it is a name of the technique with which they are used, not of the blades themselves.