Potion of Healing {1}{W}
Artifact
When this artifact enters, draw a card.
{W}, {T}, Sacrifice this artifact: You gain 3 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.
Sunbeam Spellbomb 96%
$0.18#14350
"{W}, Sacrifice this artifact: You gain 5 life."
+1 more matching line
Implement of Improvement 95%
$0.12#10448
"{W}, Sacrifice this artifact: You gain 2 life."
+1 more matching line
Oswald Fiddlebender 80%
$2.51#2864
"{W}, {T}, Sacrifice an artifact: Search your library for an artifact card with mana value equal to 1 plus the sacrificed artifact's mana value, put it onto the battlefield, then shuffle. Activate only as a sorcery."
Moon Girl and Devil Dinosaur 85%
$0.28#22672
"Whenever an artifact you control enters, draw a card. This ability triggers only once each turn."