Ally of Justice

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Ally of Justice
Ally Of Justice
"Ally of Justice Nullfier" (back) and "Ally of Justice Garadholg".

  • A・O・J(アーリー・オブ・ジャスティス)
  • A・O・J (base)
  • アーリー・オブ・ジャスティス (ruby)
  • Ārī obu Jasutisu (romanized)
  • Ally of Justice (translated)


  • A・O・J


  • Allié de la Justice


  • Verbündeter der Gerechtigkeit


  • Alleato della Giustizia


  • A・O・J


  • Aliado a Justiça


  • Aliado de la Justicia


Anime appearances

Manga appearances

"Ally of Justice" (A・O・J(アーリー・オブ・ジャスティス) Ārī obu Jasutisu) is an archetype of DARK Machine-Type monsters who are empowered during the user's Battle Phase when the opponent controls LIGHT monsters. The trump card of the archetype is "Ally of Justice Catastor", who destroys any non-DARK monster in battle. The "Allies of Justice" are introduced in Duel Terminal - Synchro Awakening!! with further support in Duel Terminal - Invasion of Worms!!, Duel Terminal - Justice Strikes Back!! and Duel Terminal - Dragunity of the Hurricane. TCG-wise, they have been released in Hidden Arsenal. Because of their effects, which include gaining ATK and destroying LIGHT monsters, they work well with "DNA Transplant". It seems they have a relation to Flamvell monsters, due to the effect of "Flamvell Magician". They possibly have some relations to Worms, Mist Valley and Genex monsters as well, judging by the card lore of both "Ally Mind" and "Ally of Justice Clausolas", the similarities between "Ally of Justice Clausolas" and "Mist Bird Clausolas", the artwork on "Mist Valley Thunder Lord", and the sub-archetype Genex Ally.

This archetype is rather unique among all others. Most archetypes tend to not focus exclusively upon destroying one particular category of opposing monsters. Indeed, against most Decks many of the cards in this Archetype will be useless. Fortunately, "DNA Transplant" can be used to set all opposing monsters to LIGHT to benefit from their effects while protecting it with "Imperial Custom".

"Allies of Justice" are designed counter the "Worm" archetype (specifically the LIGHT Reptile-type series), as these "Worms" are LIGHT monsters with Flip effects.

In the anime the Ghost army, Diablo, uses this archetype.

Recommended cards


Dark Justice

This deck is easy to get used to even without Light type monsters on the opponent's side of the field. It works pretty well if you know what you're doing.


Other Tips

If using "DNA Transplant", "Lyna the Light Charmer" can help you take over your opponent's monsters (if the Attribute 'LIGHT' is selected with "DNA Transplant"). Also, since all monsters on your field are LIGHT, you can use them to Synchro Summon "Light End Dragon" to your side of the field.

When "DNA Transplant" isn't on the field all your "Ally of Justice" monsters will be DARK and as a result you can Synchro Summon "Dark End Dragon" to your side of the field.

"Allure of Darkness" is also handy in this Deck even with "DNA Transplant" on the field because Ally of Justice monsters are still DARK-Attribute when in your hand.


Although "Ally of Justice" are strong when battling LIGHT monsters they can be countered with cards like "Skill Drain", "Destiny HERO - Plasma" and "Angel O7" (even though "Angel O7" is a LIGHT monster he negates any effects on the field). To counter those cards use cards like "Royal Decree" and "Lightning Vortex". "Acid Rain", "Magnetic Mosquito" and "System Down" also hurt the deck because they clear the field of all Machine-Type monsters on the field (especially "System Down" because it banishes them).

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