Card Trivia:Dark Ruler Ha Des
- This is one of the cover cards of Struggle of Chaos and the box of Duelist Legacy Volume.5.
- This monster appears in the artworks of "A Deal with Dark Ruler", "Bark of Dark Ruler", "Demotion", "Destruct Potion", "Flash Effect", "Hate Buster", "Leading Question", "Mind Trust", "Order to Smash", "Sinister Yorishiro", "Skill Drain", "The Puppet Magic of Dark Ruler", "Trading Places", and "Victim Barrier".
- This monster's hand appears in the artworks of "Card Devastation", "Card Reprinting", "Soul Demolition" and the Rush Duel artwork of "Card Destruction".
- Based on many artworks that depicts its storyline, this monster is the enemy of "Dark King of the Abyss".
- The "Ha Des" in this card's name is a pun on "Hades", the name of the Greek god of death and the underworld (which is called "Hades" as well).
- This card's Japanese name,「冥界の魔王 ハ・デス」, contains an interpunct 「・」 between "Ha" 「ハ」 and "Des" 「デス」, showing that they are actually two words. This was probably intended to be a pun, because the Japanese spelling of the word "death" is "des" (which is also used in "Desrook Archfiend" and "Des Lacooda").
- This card has a Synchro Zombie counterpart: "Revived King Ha Des".
- This monster is the boss of "Opticlops" (see the card's lore), "Winged Minion" (see "Victim Barrier" and the OCG name of "Winged Minion"), "Dark Resonator" (see "Mind Trust"), and "Berserk Dragon" (see "A Deal with Dark Ruler").
- After turning into the Zombie "Revived King Ha Des", this monster also gained power over "Archfiend Zombie-Skull" (see "Reanimation Wave").
