Union Monsters

Union monsters are a kind of Monster card in the TCG and HCCG; specifically, they are a subtype of Effect Monsters. They are not a very common subtype, and fewer than 10 Union monsters currently exist in HCCG. They are color-coded orange.

All Union monsters have the special ability of becoming Equip Cards and equipping themselves to other monsters their owner controls. Like many other kinds of Equip cards, they typically list the specific kind of monster they can equip to in their effects. Union monsters also have the ability to unequip from their target, in which case they are Special Summoned to the field (obviously this cannot happen if their controller has no available Monster Card Zones). Each Union monster can change between a Monster and an Equip card only once per turn. Some Union monsters have additional effects as well.

The built-in effect of all Union monsters is: "(A monster can only by equipped with 1 Union monster at a time. If the equipped monster would be destroyed, destroy this card instead.)" In the TCG, there are some instances of Union monsters (mainly the earlier ones) which only protect the equipped monster from destruction by battle, but these instances do not exist in HCCG in an effort to balance the mechanic of Union monsters and to promote their usage.

Because many Union monsters can result in negative field advantage, they are generally considered inferior to other Effect monsters. Currently, the Catty archetype is the only HCCG archetype that features a Union monster, the monster in question being Driller Catty. In addition, the monster Tri-Colored Frog is currently the only support card for Union monsters.

To see a list of Union monsters in HCCG, see this page.