Card Trivia:D/D/D Doom King Armageddon
- This is one of the cover cards of Booster SP: Raging Masters.
- This monster appears in the artwork of "Dimension Drape".
- This is the signature card of Declan Akaba in the Yu-Gi-Oh! ARC-V anime.
- This card has the same ATK (3000) as the signature cards of the rivals of the other anime series: Seto Kaiba's "Blue-Eyes White Dragon", Chazz Princeton's "Armed Dragon LV10", Jack Atlas' "Red Dragon Archfiend", Kite Tenjo's "Galaxy-Eyes Photon Dragon", and Varis' "Borreload Dragon".
- This is the first and one of the two signature cards of an anime rival to not be a Dragon monster, the other being Zuwijo zir Velgear's "Voidvelgr Requiem".
- The kanji Shiiō (
死 偉 王 , lit. "Death Great King") in this card's Japanese name is a homophone of "CEO" ("Chief Executive Officer"), the highest officer charged with the management of an organization.- Fittingly, in the Yu-Gi-Oh! ARC-V anime, Declan Akaba was the CEO of Leo Corporation.
- This monster has five alternate forms.
- Two Main Deck forms with a lower title: "D/D/D Vice King Requiem" and "D/D/D Chaos King Apocalypse".
- Three Extra Deck upgraded forms:
