It's a bit win-more in some +1/+1 Counter decks, like most Atraxa, Praetors' Voice, since it doesn't do much on its own and only gains tons of value once you have a creature with tons of counters already
Of course, printing a narrow sideboard card like Grafdigger's Cage doesn't mean that Snapcaster Mage goes from the best card in Standard to completely unplayable, but it does offer players a way to compete with the graveyard theme from Innistrad
Well just have to wait and see how things play out in the coming weeks
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The opponent is forced to make these effects happen by attacking you
Morophon, the BoundlessMorophon, the Boundless - 72,510 decks, 13,320 as commander It's the Super Changeling