Digital-Only Eggs These cards were only released on MTG Arena as part of Alchemy sets: Ominous Lockbox is a very cool card
While initially doing little of note, the archetype quickly made great use of "Brionac, Dragon of the Ice Barrier" pre-errata
Aang's Journey Aerith Rescue Mission Agate Assault Aggressive Negotiations Analyze the Pollen Ancestral Anger Ancestral Reminiscence Ancient Vendetta Angelic Edict Another Round Antiquities on the Loose Anzrag's Rampage Applied Geometry Arcane Omens Archaic's Agony Artistic Process Asinine Antics Assert Perfection Atlantis Attacks Audience with Trostani Auntie's Sentence Avatar's Wrath Avengers Disassembled Back for Seconds Back on Track Badlands Revival Beastie Beatdown Become Brutes Behold the Sinister Six
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Abzan, Abzan Liege, UWR Control, UWR Midrange, UW Control, Hatebears, Death and Taxes, Zoo, and an enormous range of other Modern mainstays