Cleon, Merry Champion {2}{R}
Legendary Creature — Human Soldier
Double strike
Heroic — Whenever you cast a spell that targets Cleon, exile the top card of your library. You may play that card until the end of your next turn.
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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.
Emberheart Challenger 83%
$0.96#8623
"Whenever this creature becomes the target of a spell or ability you control for the first time each turn, exile the top card of your library. Until end of turn, you may play that card."
Stella Lee, Wild Card 81%
$4.95#4694
"Whenever you cast your second spell each turn, exile the top card of your library. Until the end of your next turn, you may play that card."