Judge's Pen-Part 1

Scientifically, it is said that the underworld artifacts are buried in the ground, telling a history that no one knows. In mythology, it is said that underworld objects - things from the underworld, the book of life and death of the king of hell, the judge's pen of the judge, the impermanent ghosts and floating dust, etc., Each have their own uses. In fact, any explanation is fine, because people who can use it will not care about history. As long as they know how to use it and why to use it, is the rest important?