• In Greek mythology the sun was personified as Helios.
  • This card's name is a play on "Hermes Trismegistus" (meaning "thrice-great Hermes") who is said to be the author of the "Emerald Tablet", an ancient Alchemical text which was also the inspiration for Amnael's Shadow Charm.
  • Also, in the later Roman Empire, the cult of Helios Megistus claimed that all the elements were ruled by the Sun God.
  • For this card's Japanese and International artworks (as well as in the anime), this card is the only one of the three "Helios" cards to not be changed at all (no bust editing).
  • The word, "Megistus" is derived from the Greek word, Megisti, meaning "biggest" or "greatest," hence this monster's larger appearance compared to its other forms.
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