It wont take a high perception check to notice the stunning art
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It reads Other creatures you control with counters on them have flying and haste. Meanwhile, Sonic the Hedgehog from the recent Secret Lair drop is a 2/4 with haste and Gotta Go Fast
I think Endless One could be fine in a deck that has a focus on the +1/+1 counters on your creatures with cards like Avatar of the Resolute, but as a big payoff spell, the other options are miles better

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