Whiskerquill Scribe {1}{R}
Creature — Mouse Citizen
Valiant — Whenever this creature becomes the target of a spell or ability you control for the first time each turn, you may discard a card. If you do, draw a card.
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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.
Hazoret's Monument 88%
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"Whenever you cast a creature spell, you may discard a card. If you do, draw a card."
Volatile Wanderglyph 86%
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"Whenever this creature becomes tapped, you may discard a card. If you do, draw a card."
Rescue Leopard 86%
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"Whenever this creature becomes tapped, you may discard a card. If you do, draw a card."
Hangar Scrounger 86%
$0.21#15031
"Whenever this creature becomes tapped, you may discard a card. If you do, draw a card."
Reckless Racer 86%
$0.07#22628
"Whenever this creature becomes tapped, you may discard a card. If you do, draw a card."