Ten rings are usually worn on each finger, and each ring can give the wearer different powerful forces. Xu owns this ring artifact in the MCU, but the movie doesn't explain how he got it. Of course, this legendary story has been forgotten by time in this film.
Ten ring's ability
The story of the whole movie revolves around the differences between Shang Qi and his father, and the whole story is related to ten ring. This is an extremely powerful artifact, which can make people live forever and have super fighting power. Wu Wen won the Ten Commandments thousands of years ago.
But banner said it must be more than 1000 years old. Even Carol, the captain of the well-informed surprise attack in the universe, has never seen a similar technology. Most importantly, it constantly sends out signals, which can spread from tarot cards to shelters in Doctor Strange, which means that its signals can span different universes.