Cruel Deceiver {1}{B}
Creature — Spirit
{1}: Look at the top card of your library.
{2}: Reveal the top card of your library. If it's a land card, this creature gains "Whenever this creature deals damage to a creature, destroy that creature" until end of turn. Activate only once each turn.
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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.
Callous Deceiver 100%
$0.09#30784
"{1}: Look at the top card of your library."
+1 more matching line
Narset Transcendent 86%
$8.72#7931
"+1: Look at the top card of your library. If it's a noncreature, nonland card, you may reveal it and put it into your hand."
Domri Rade 86%
$0.92#10127
"+1: Look at the top card of your library. If it's a creature card, you may reveal it and put it into your hand."
Sorin the Mirthless 85%
$2.20#7877
"+1: Look at the top card of your library. You may reveal that card and put it into your hand. If you do, you lose life equal to its mana value."