Turn Inside Out 
Instant
Target creature gets +3/+0 until end of turn. When it dies this turn, manifest dread. (Look at the top two cards of your library. Put one onto the battlefield face down as a 2/2 creature and the other into your graveyard. Turn it face up any time for its mana cost if it's a creature 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.
Reckless Ransacking 91%
$0.28#7845
"Target creature gets +3/+2 until end of turn. Create a Treasure token."
Cyclical Evolution 90%
$0.18#25378
"Target creature gets +3/+3 until end of turn. Exile this card with three time counters on it."
Vampire's Bite 90%
$0.30#20823
"Target creature gets +3/+0 until end of turn. If this spell was kicked, that creature gains lifelink until end of turn."
Fully Grown 90%
$0.30#10829
"Target creature gets +3/+3 until end of turn. Put a trample counter on it."