Markov Purifier {1}{W}{B}
Creature — Vampire Cleric
Lifelink
At the beginning of your end step, if you gained life this turn, you may pay {2}. 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.
Necrodominance 82%
$2.50#4288
"At the beginning of your end step, you may pay any amount of life. If you do, draw that many cards."
Shanna, Purifying Blade 81%
$0.40#14854
"At the beginning of your end step, you may pay {X}. If you do, draw X cards. X can't be greater than the amount of life you gained this turn."
+1 more matching line
Sanguine Spy 81%
$0.30#13133
"At the beginning of your end step, if there are five or more mana values among cards in your graveyard, you may pay 2 life. If you do, draw a card."
+1 more matching line