One of Eirin Yagokoro's spell cards is called "Curse of the Heavens 'Apollo 13'," and is named after the famed Apollo 13 of NASA's space project, which had a critical malfunction and was sent back to Earth.

In the attack's description on Normal difficulty, it reads "13 is an unlucky number. Only Lunarians know the reason for its failure." It is revealed in later supplementary works that its failure was the result of Lunarian sabotage.