Exalted Dragon {4}{W}{W}
Creature — Dragon
Flying
This creature can't attack unless you sacrifice a land. (This cost is paid as attackers are declared.)
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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.
Monstrous Hound 89%
$0.24#31255
"This creature can't attack unless you control more lands than defending player."
Veteran Brawlers 87%
$2.10#26746
"This creature can't attack if defending player controls an untapped land."
Branded Brawlers 87%
$0.05#30989
"This creature can't attack if defending player controls an untapped land."
Ronom Serpent 80%
$0.18#27484
"This creature can't attack unless defending player controls a snow land."