I have seen this frustration bear out firsthand when a Blight Dragon pilot could not generate enough black to keep their Commander safe
Murmuring Mystic I often finding myself cutting this from Izzet spellslinger tokens decks because its so much harder to cast in those shells as a 4-drop, but Murmuring Mystic is kinda cool doing the same kind of job in mono-blue or Azorius in decks like Octavia, Living Thesis, Raff, Weatherlight Stalwart, and my newest obsession, Zethi, Arcane Blademaster
This is reminiscent of Dimir creatures like Lazav, the Multifarious
Despite having mana values based on X while on the stack, all of these cards will still consider X to be 0 when theyre on the battlefield, no matter how many counters they have
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