Artmegia Banish - Change

Place 1 "Artmegia the Academy City of Divine Arts" from your Deck or GY face-up in your Field Zone, or, if you control "Artmegia the Academy City of Divine Arts", you can add 1 "Artmegia" card from your Deck to your hand instead, except "Artmegia Banish - Change". When your "Artmegia" monster is targeted for an attack: You can banish this card from your GY; negate that attack, then you can Special Summon 1 "Medius the Innocent" from your hand. You can only use each effect of "Artmegia Banish - Change" once per turn.