Card Trivia:Superdreadnought Rail Cannon Gustav Max
- This monster appears in the artworks of "Barrage Blast" and "Upgrade".
- This monster is based on the Schwerer Gustav, a German railway gun developed in World War II.
- This monster is also likely based on the Langer Gustav, a larger German railway gun developed around the same period, but was never completed due to being damaged from bombing raids mid-construction.
- This monster's name, "Superdreadnought", is based on the super-dreadnought battleship, a more powerful class of dreadnought battleship with larger guns and more armor. This references how railway guns were often armed with surplus naval cannons, especially those of battleships.
- This is the first Rank 10 Xyz Monster to be revealed and released in the OCG/TCG.
