Union monster
Union Monsters can be recognized by the fact that, where on a normal Effect Monster it would read 'Effect', Union Monsters have 'Union'. Cards such as Dark Necrofear or Kiseitai act as equip cards but do not have the text designating them Union Monsters.
Union monsters are a special type of Effect Monster with (type)/Union in their card text. They can function like an Equip Spell Card (Or just an Equip Card), and thus become vulnerable to cards that destroy Spell Cards, such as Mystical Space Typhoon. They generally grant the host Monster additional strength, such as an increase in ATK/DEF. All Union Monsters Destroy themselves to protect the host monster if it would be Destroyed while equipped.
The Union Monsters introduced the XYZ card set (which would later include V and W), which had a new way of using their Fusion Monsters. This unorthodox method involves removing the Fusion Materials from play to Special Summon the Fusion Monster from the Fusion Deck (This is not considered Fusion Summon). Polymerization cannot be used to Fusion Summon these monsters at any time.
Here is a list of union cards:
(Cards that the union monster can equip to will be listed in parentheses after the name of each monster)
- Burning Beast + (Freezing Beast)
- Des Dendle + (Vampire Orchis)
- Doitsu + (Soitsu)
- Freezing Beast + (Burning Beast)
- Heavy Mech Support Platform + (Any Machine-Type monster)
- Kiryu + (Dark Blade)
- Koitsu + (Aitsu)
- Metallizing Parasite - Lunatite + (Any monster)
- Pitch-Dark Dragon + (Dark Blade)
- Protective Soul Ailin + (Indomitable Fighter Lei Lei)
- Second Goblin + (Giant Orc)
- W-Wing Catapult + (V-Tiger Jet)
- Y-Dragon Head + (X-Head Cannon)
- Z-Metal Tank + (X-Head Cannon or Y-Dragon Head)
- Zombie Tiger + (Decayed Commander)
- Relic of the Six Samurai + (Any Six Samurai monster)
And here is a list of the support cards they use:
