Maga, Traitor to Mortals {X}{B}{B}{B}
Legendary Creature — Human Wizard
Maga enters with X +1/+1 counters on it.
When Maga enters, target player loses life equal to the number of +1/+1 counters on it.
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Cards that do something similar expected a card that isn't here?
Reports become test cases the matcher is graded against before an update ships. Delvefall isn't a chatbot guessing, it compares the printed rules text of every card with plain math, and examples like yours decide which differences should count.
The Goose Mother 100%
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"this card enters with X +1/+1 counters on it."
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"this card enters with X +1/+1 counters on him."
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Prime Speaker Zegana 85%
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"this card enters with X +1/+1 counters on it, where X is the greatest power among other creatures you control."
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