Bluesworn

The Bluesworn are a series of Water attribute monsters that appear in The Sworn Alliance. Their main method of play revolves around summoning out the machine type Bluesworns, the "Devils", and equipping them with a single warrior type Bluesworn a piece, a pilot, otherwise known as an "Angel".

Despite the fact that this archetype revolves around equipping monsters to other monsters, none of the Bluesworns are, in fact, Union monsters. The Bluesworns act similarly to Union monsters, but in the end act differently enough to be readily noticeable.

Bluesworn monsters that are treated as Equip cards cannot be freely special summoned back to the field, first off. And secondly, should something happen to remove the equipped monster, the monster that was equipped with it simply takes it place, it doesn't protect it. This makes sense, as it is the job of a mech to protect its pilot from danger.

A major advantage to the Bluesworn cards is that should there be a Warrior type Bluesworn monster on the field, a machine type Bluesworn can then be special summoned from the hand. A disadvantage, however, lies with the Warrior type Bluesworns. They cannot be special summoned, except by the effects of Bluesworn cards.