Ghalta and Mavren {3}{G}{G}{W}{W}
Legendary Creature — Dinosaur Vampire
Trample
Whenever you attack, choose one —
• Create a tapped and attacking X/X green Dinosaur creature token with trample, where X is the greatest power among other attacking creatures.
• Create X 1/1 white Vampire creature tokens with lifelink, where X is the number of other attacking creatures.
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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.
Chong and Lily, Nomads 84%
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+1 more matching line
Tetsuo, Imperial Champion 83%
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"Whenever this card attacks, if it's equipped, choose one —"
+1 more matching line