Primal Adversary {2}{G}
Creature — Wolf
Trample
When this creature enters, you may pay {1}{G} any number of times. When you pay this cost one or more times, put that many +1/+1 counters on this creature, then up to that many target lands you control become 3/3 Wolf creatures with haste that are still lands.
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Cards that do something similar expected a card that isn't here?
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Venomous Brutalizer 82%
$0.29#7596
"When this creature enters, you may pay {1}{G}. If you do, proliferate."