Yavimaya Kavu {2}{R}{G}
Creature — Kavu
Yavimaya Kavu's power is equal to the number of red creatures on the battlefield.
Yavimaya Kavu's toughness is equal to the number of green creatures on the battlefield.
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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.
An-Havva Constable 94%
$0.31#30039
"this card's toughness is equal to 1 plus the number of green creatures on the battlefield."
Altar Golem 90%
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"this card's power and toughness are each equal to the number of creatures on the battlefield."
Beast of Burden 90%
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Plague Rats 88%
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"this card's power and toughness are each equal to the number of creatures named this card on the battlefield."
Caller of the Hunt 86%
$1.26#21197
"this card's power and toughness are each equal to the number of creatures of the chosen type on the battlefield."
Pestilence Rats 84%
$0.32#10192
"this card's power is equal to the number of other Rats on the battlefield."
Ixidron 84%
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"this card's power and toughness are each equal to the number of face-down creatures on the battlefield."