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, when used with a Compatible Monster, 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. When in this mode, they can grant special abilities to the host monster, such as more ATK/DEF.
The Union Monster can also 'detach' from its host monster, and will then be Special Summoned to the field in face-up Attack Position. You can only 'detach' or 'attach' once per turn.
However, all of these fusions (with the exception of Dark Blade the Dragon Knight) use an unorthodox method of fusing, in that they remove from play the Fusion-Material Monsters on your side of the field, to Special Summon the Fusion Monster in question, and 'Polymerization' is not used. This Special Summon is not considered a Fusion Summon.
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:
