When this card is activated : You can add 1 LIGHT Machine Union monster from your Deck to your hand . Once per turn , if a LIGHT Machine Union monster (s) is Normal or Special Summoned to your field (except during the Damage Step ): You can target 1 of those monsters ; equip 1 appropriate LIGHT Machine Union monster, with a different name, from your Deck to that monster, but the Union monster you equipped cannot be Special Summoned this turn. You can only activate 1 "Union Hangar" per turn.