Quiet Speculation 
Sorcery
$0.67 #11869 0.06 24.4 years
Search target player's library for up to three cards with flashback and put them into that player's graveyard. Then the player shuffles.
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Cards similar to Quiet Speculation 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.
Phantom Carriage74%
$0.07↓#26326↓0.19↑5.1 years↓
"When this creature enters, you may search your library for a card with flashback or disturb, put it into your graveyard, then shuffle."