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Counterfeits often show: muddy dots misaligned patterns colors bleeding in ways the rosette pattern doesnt This is one of the more reliable non-destructive checks if you have a loupe or phone macro lens

Mirris Guile and Sylvan Library are other versions of this effect that see a lot of play, and they are likewise significantly worse without a cheeky shuffle now and then

You notice the card, not the print

Sower of Discord Another Commander card designed for multiplayer formats because it can affect multiple players (which you probably want to be your opponents)

That spell is exiled and you can then cast it for free