Investigator's Journal {2}
Artifact — Book Clue
This artifact enters with a number of suspect counters on it equal to the greatest number of creatures a player controls.
{2}, {T}, Remove a suspect counter from this artifact: Draw a card.
{2}, Sacrifice this artifact: 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.
Scroll of Avacyn 92%
$0.26#17000
"{1}, Sacrifice this artifact: Draw a card. If you control an Angel, you gain 5 life."
Culling Dais 85%
$0.17#7386
"{1}, Sacrifice this artifact: Draw a card for each charge counter on this artifact."