Hipsters of the Coast on Twitter: "Arena players will receive rare wildcards for any copies of the banned cards they own. #MTG #MTGArena Banned cards will also be removed from ICRs and
Agent of Treachery, Fires of Invention Banned in Standard and Historic, Companion Mechanic Errata'd : Hipsters of the Coast
Agent of Treachery and Mirror March is insane : r/MagicArena
MTG Arena Fires of Invention & Agent of Treachery Banned
Agent of Treachery · Core Set 2020 (M20) #43 · Scryfall Magic: The Gathering Search