• Sigma is the eighteenth letter of the Greek alphabet.
    • The Roman numerals engraved on its chest (XVIII) indicates this order.
    • This card also has 1800 ATK, which also indicates the statements above.
  • This card's body also slightly resembles an uppercase Sigma "Σ" when viewed from the side, while the golden rings on its back and around its arms are shaped like a lowercase Sigma "σ".
  • This card's summoning requirements almost match that of "Trident Dragion", except that this card requires all LIGHT-Attribute Synchro Material Monsters instead of Dragon-type Synchro Material Monsters.
  • This card is one of the few (if not only) monsters that can equip an Equip Spell Card without actually 'activating' it, and also with the ability of equipping cards straight from the Deck without adding it to the hand first.
  • This card is also one of the few monsters that can only activate its effect while it is the only monster the player controls (as opposed to most archetype-related monsters).

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