Quill-Slinger Boggart {3}{B}
Creature — Goblin Warrior
Whenever a player casts a Kithkin spell, you may have target player lose 1 life.
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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.
Smolder Initiate 88%
$0.15#27657
"Whenever a player casts a black spell, you may pay {1}. If you do, target player loses 1 life."
Rug of Smothering 85%
$0.53#3816
"Whenever a player casts a spell, they lose 1 life for each spell they've cast this turn."
Mai, Scornful Striker 84%
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"Whenever a player casts a noncreature spell, they lose 2 life."
Dragonlord Kolaghan 82%
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"Whenever an opponent casts a creature or planeswalker spell with the same name as a card in their graveyard, that player loses 10 life."