Card Trivia:Dark Ruler Ha Des
- Ha Des is a pun on the name "Hades", the name of the Greek god of death and the underworld (which is called "Hades" as well).
- The Japanese title 「冥界の魔王 ハ・デス」 contains an interpunct 「・」 between "Ha" 「ハ」 and "Des" 「デス」, showing that it is 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 monster appears in the artworks of the following cards:
- This monster's hand appears in the artwork of "Raigeki Break", "Card Destruction" and "Soul Demolition".
- This card has a Zombie-Type Synchro counterpart, "Revived King Ha Des".
- Based on the artworks of "Demotion", "Hate Buster", "Mind Drain", "Skill Prisoner", etc., this monster is enemies with "Dark King of the Abyss".
- 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 it becomes "Revived King Ha Des", it also gains power over "Archfiend Zombie-Skull" (see "Reanimation Wave").