UAO-Frame and Sky Vault

[Just Crouton]

The greatest, best Union support that has ever been put on YCM! Also, can you point out the TV references in this thread?

[color="#FF8C00"][b]UAO-Frame[/b][/color]
*4
EARTH
Warrior/Effect
ATK 1800
DEF 1000
Effect: You can treat this card's name as a monster printed in the card text of a Union monster you control, and equip it to this card.

[color="#FF8C00"][b]UAO-Operator[/b][/color]
*4
EARTH
Warrior/Effect
ATK 1200
DEF 1000
Effect: You can discard this card to select 1 Union Monster in your Graveyard and equip it to an appropriate monster you control.

[color="#00FF00"][b]Sky Vault[/b][/color]
Continuous Spell
Once per turn, when you Normal Summon a monster successfully, you can add 1 Union monster whose Level is lower than the summoned monster from your Deck to your hand. You cannot use that Union monster this turn. When a face-up monster you control is attacked, you can equip 1 face-up Union monster you control to an appropriate monster on your side of the field.

[Just Crouton]

bump

[Just Crouton]

bump

[Bringerofcake]

I forget rulings on "use". Can the monster be Special Summoned by another card effect?