Hide // Seek 
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Instant // Instant
Put target artifact or enchantment on the bottom of its owner's library.
Search target opponent's library for a card and exile it. You gain life equal to its mana value. Then that player shuffles.
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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.
Praetor's Grasp 83%
$11.03#1633
"Search target opponent's library for a card and exile it face down. Then that player shuffles. You may play that card for as long as it remains exiled."