D/D/D

"Declan Akaba on the D/D/D."

- The title "D/D/D" stands for Different Dimension Demon. Prepare to get a good taste of the power of kings who subjugate alternate planes.

"D/D/D", known as DDD ( DīDīDī) in the English manga, is an sub-archetype of the "D/D" archetype used by Declan Akaba in the special Yu-Gi-Oh! ARC-V chapter and anime. The "D/D/D" monsters serve as the "bosses" of the "D/D" due to most of their gameplay focusing on their summoning.

Design
So far, every "D/D/D" monster has been named after a historical military leader, except "D/D/D Hell Armageddon the Cruel End Overlord", "D/D/D Kali Yuga the Twin Dawn Overlord", and "D/D/D Oblivion King Abyss Ragnarok", which are named after mythical final battles.

Etymology
According to Declan, "D/D/D" is short for "Different Dimension Demon" (ディファレント・ディメンション・デーモン Difarento Dimenshon Dēmon). The "D/D/D" monsters, mark the first time that monsters with the term "Demon" (or "Daemon") on their names that are not altered by the usual "Archfiend" name in TCG territory. However since the name "Demon" is reduced to a mere acronym letter, this use of word is rather subtle.