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Trample
When Primal Adversary enters the battlefield, 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 Primal Adversary, then up to that many target lands you control become 3/3 Wolf creatures with haste that are still lands.
After you pay the {1}{G} cost one or more times, a second ability triggers and you choose the targets for it. Players may respond to the new ability at that point. As that ability resolves, Primal Adversary gets its +1/+1 counters and the target lands become Wolf creatures.
Any land that becomes a Wolf creature this way will retain any supertypes, card types, subtypes, and abilities it had.
