Camelot, Realm of Noble Knights and Noble Arms

Once per turn, if a "Noble Knight" card(s) you control would be destroyed by battle or card effect, you can destroy 1 Equip Card you control instead. During your Main Phase: You can banish this card (until the next Standby Phase), and if you, place 1 "Noble Knights of the Round Table" from your hand, Deck, or GY, face-up in your Field Zone, then you can Special Summon 1 "Artorigus" monster, or add to your hand 1 "Noble Arms" card, from your Deck or GY. You can only use this effect of "Camelot, Realm of Noble Knights and Noble Arms" once per turn.