What are the legendary three treasures of crows?

Crow's three treasures refer not to a China zodiac, but to an ancient Japanese legend. The crow's three treasures in the story refer to three things that can bring happiness to mankind: a mysterious stone mirror, a magical octagonal mirror and a peerless heavenly sword. These three treasures are said to have been created by mythical gods and ravens, and the three treasures of crows have also become one of the famous symbols in Japanese culture.