The Army of Darkness, also known as the Dark Army and Creatures of the Dark, is a monstrous army made purely of dark magic.
Towards the end of Season 1, the Trix seemingly stole the Dragon's Flame from Bloom and used it to summon the army and destroy Red Fountain. When the Trix were defeated, the entire army vanished before everyone's eyes because Icy, Darcy and Stormy no longer had the strength to command it, and because the power of the army depended on that of the Trix.
One important characteristic is that for each monster cut or killed, two more will appear. The monsters can also unite into one beast. Only a possessor of the Dragon's Flame (or something with equal power) can summon it with its spell, though Griffin told the Trix that nothing can control it when they revealed their intentions of summoning it.
- In the 4Kids version, it is called the "Army of Decay".
- In the German dub, it is called "Armee des Todes", which means "Army of Death".
- Army of Darkness is also the name of the army of Deadites appearing in the Evil Dead film of the same name. In addition, the book used to summon the Army of Darkness resembles the Necronomicon from the Evil Dead series.