Card Trivia:Seven-Armed Fiend
- This card's Japanese name contains "Demon" (デーモン Dēmon), which makes it an "Archfiend" monster.
- In the Japanese version of the Yu-Gi-Oh! anime, this card had 666 ATK and 666 DEF, with 666 commonly believed to be the "Number of the Devil" in the Bible; they were changed to 1000 in the dubbed versions.
- This is the first card to have an original ATK and DEF that is not evenly divisible by 10.
- This card was used by Alexander the Great during the Capsule Monsters arc. Each of this monster's arms contained a special ability:
- The Arm of Skulls allowed it to summon an army of "Skull Knight #2".
- The Arm of Regeneration allowed it to revive any monster in its army.
- The Arm of Entrapment allowed to grab and hold any opponent, no matter the distance.
- The Arm of Defense allowed it to erect an impenetrable barrier.
- The Arm of Destruction allowed it to unleash a massive fireball, its most powerful ability.
- The Arm of Clairvoyance allowed it to read the opponent's thoughts.
- Its remaining arm demonstrated no ability beyond swiping at enemies.