Advanced format ruling
Formation Union
Card effect (current official text)Select and activate 1 of the following effects:
● Equip 1 Union Monster on your side of the field to an appropriate monster on your side of the field as an Equip Spell Card.
● Unequip 1 of your equipped Union Monsters and Special Summon it to your side of the field in face-up Attack Position.
Current rulings for this card are maintained by Konami.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Advanced forum — sourced change requests get reviewed.