Once per turn, during your Main Phase, if you control this monster on the field, you can equip it to your "X-Head Cannon" as an Equip Spell Card, OR change it back to a monster in face-up Attack Position. When equipped to a monster by this card''s effect, that monster''s ATK/DEF is increased by 400 points. (1 monster can only be equipped with 1 Union Monster at a time. If the monster that this card is eqipped to is destroyed in battle, this card is destroyed instead.)
![Y-Dragon Head [MFC-005] Super Rare | L.A. Mood Comics and Games](http://lamoodcomics.ca/cdn/shop/products/a1b9d6ce-82f3-50f4-a795-d01845e976b8.jpg?v=1707433594)
