Connecting the Dots 

Enchantment
Whenever a creature you control attacks, exile the top card of your library face down. (You can't look at it.)
{1}{R}, Discard your hand, Sacrifice this enchantment: Put all cards exiled with this enchantment into their owners' hands.
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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.
Tempered in Solitude 92%
$0.26#12038
"Whenever a creature you control attacks alone, exile the top card of your library. You may play that card this turn."
Kami of Celebration 89%
$1.00#6590
"Whenever a modified creature you control attacks, exile the top card of your library. You may play that card this turn."
Bomat Courier 88%
$0.22#12903
"Whenever this creature attacks, exile the top card of your library face down."
+1 more matching line
Caves of Chaos Adventurer 84%
$0.44#7374
"Whenever this creature attacks, exile the top card of your library. If you've completed a dungeon, you may play that card this turn without paying its mana cost. Otherwise, you may play that card this turn."
Synth Eradicator 83%
$0.32#8467
"Whenever this creature attacks, exile the top card of your library. You may get {E}{E} . If you don't, you may play that card this turn."
Robber of the Rich 82%
$1.52#10249
"Whenever this creature attacks, if defending player has more cards in hand than you, exile the top card of their library. During any turn you attacked with a Rogue, you may cast that card and you may spend mana as though it were mana of any color to cast that spell."
Pick Up the Pace 82%
$0.41#28430
"Whenever a creature you control that entered this turn attacks, exile the top card of your library."
+1 more matching line
Mezzio Mugger 81%
$0.32#12165
"Whenever this creature attacks, exile the top card of each player's library. You may play those cards this turn, and you may spend mana as though it were mana of any color to cast those spells."
Laelia, the Blade Reforged 81%
$0.30#1297
"Whenever this card attacks, exile the top card of your library. You may play that card this turn."
Daredevil, Fearless Fighter 81%
$3.56#19255
"Whenever this card attacks, exile the top card of your library. this card deals damage to you equal to that card's mana value. You may play it this turn."
Gila Courser 81%
$0.17#15641
"Whenever this creature attacks while saddled, exile the top card of your library. Until the end of your next turn, you may play that card."
Nathan Drake, Treasure Hunter 80%
$4.72#14996
"Whenever this card attacks, exile the top card of each player's library. You may cast a spell from among those cards."