Add 1 Equip Spell from your Deck to your hand, then you can equip it to 1 appropriate monster you control. You can only activate 1 "Armory Call" per turn.
The fact that it adds to your hand and the equipping is optional, means you can use that equip spell in your hand for something else if you need to do so, for example as Karma Cut discard fodder.
Thank you for visiting Duel Links wiki by GameA! We update this Yu-Gi-Oh! Duel Links community day by day to provide quality guides and the latest news.