Ally of Justice

The Allies of Justice are a series 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 series is "Ally of Justice Catastor", who destroys any non-DARK monster in general. 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 "Flamvell Magician's" effect. They possibly have some relations to Worms, Mist Valley and Genex monsters as well, judging by Ally Mind's card lore, Ally of Justice Clausolas' card lore, Thunder Lord of Mist Valley's artwork and the name of Ally Genex Durdark.

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 and Scroll of Bewitchment can be used to set all opposing monsters to LIGHT to benefit from their effects.

Allies of Justice counter the Worm Archetype very well, as the Worms are all LIGHT monsters with flip effects. Allies of Justice are designed to destroy LIGHT monsters, and can also counter flip effects.

Even though they can be used to counter Cyber Dragon decks, they could also help out in one, because most of them have effects that limit the usefulness of LIGHT monsters (such as The Creator or the Lightsworns), and since they're all Machines, they can be used as extra material for the Chimeratech monsters.

An interesting thing to note about this Archetype's name is that "Ally of Justice" usually would make people think that they are LIGHT monsters, since "Justice" is usually associated with "goodness/good side" which is, in turn, usually associated with LIGHT, therefore an "Ally" (friend/team mate) of "Justice" would be on the good/LIGHT side as well. But in reality, they are ironically DARK, and have effects that destroy LIGHT monsters instead. However, their abilities might be a reference to The Light of Destruction.

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