- This card has a Signer Dragon counterpart: "Red Dragon Archfiend".
- Jack's Mark of the Dragon from the anime is on this monster's chest.
- This monster's effect is the opposite of "Red Dragon Archfiend"; it destroys Attack Position monsters during the Main Phase, while "Red Dragon Archfiend" destroys Defense Position monsters during the Battle Phase.
- There are two puns in this card's Japanese name:
- The kanji "琰" is made up of the character (炎) "Flame" and the radical of "King" (王).
- The "琰魔" in its name, which characterizes the dragon, is pronounced as "Enma", similar to "Yama" (閻魔), the God who rules over death, hell and the cycle of rebirth in Buddhism and Chinese mythology.
- This card has three evolved forms: "Hot Red Dragon Archfiend Abyss", "Hot Red Dragon Archfiend Bane" and "Hot Red Dragon Archfiend King Calamity".
- This card has the most forms of any "Duel Dragons".
- This monster appears in the artwork of "Red Supremacy".