Attended Knight
Attentive Skywarden
Attentive Sunscribe (Foil)
Attuned Hunter
Audacious Thief
Audience with Trostani
Auditore Ambush
Auger Spree
Augmenting Automaton
Augur of Bolas
Augury Owl
Aunt May
Auramancer
Aurelia's Vindicator
Aurelia, the Law Above