"Ride of the Valkyries", known as "Walkürenritt" in its original German, is an excerpt from the opera The Valkyrie, or Die Walküre in German, by Richard Wagner. It is one of Wagner's best-known pieces.
The card "Ride of the Valkyries" is named after this piece. In the Japanese version, the card is called "Walkuren Ritt" (Ｗａｌｋｕｒｅｎ Ｒｉｔｔ, Warukyūren Ritto) after the piece's German name.
- en.wikipedia.org "Ride of the Valkyries" on Wikipedia