Dark Triad

The Dark Triad are a trio of powerful mages who currently rule over the Spade Kingdom.

Overview
The Dark Triad are three mages who currently rule the Spade Kingdom. Years ago, they usurped rule of the Kingdom from the royal family, House Grinberryall. The Dark Triad uses fear to subjugate the people and take control of the nation.

Under their rule, the Spade Kingdom has conquered most of the Diamond Kingdom and begun preparing to invade the other kingdoms. The weaker citizens of the Spade Kingdom have been forced from their homes and into service as sources of magic power for the kingdom's mobile fortresses.

Tree of Qliphoth
One of the Dark Triad's objectives is the creation of the Tree of Qliphoth (クリフォトの樹), a magic channel that connects to the underworld and will allow devils to enter the living world. The tree requires World Tree Magic and Dark Magic to grow, so Zenon Zogratis leads an attack on the Golden Dawn squad in order to capture William Vangeance, while Dante attacks the Black Bull squad to capture Yami Sukehiro.

Members
The members of the Dark Triad are all known to be extremely powerful mages whose strength is on par with devils, as they are possessed by the highest-ranking devils from the underworld. Their direct subordinates are the Dark Disciples who can access significant proportions of a devil's power such as 40%. These powers grant the Dark Triad and Dark Disciples a massive boost in power which allow them to easily take on and overpower an entire squad of Magic Knights on their own.

Trivia

 * The Qliphoth is the arrangement of evil forces in Kabbalah and is the opposing structure to the Sefirot, which was used for the elves' apostles and tree of life monument.