Rogue Class {U}{B}
Enchantment — Class
(Gain the next level as a sorcery to add its ability.)
Whenever a creature you control deals combat damage to a player, exile the top card of that player's library face down. You may look at it for as long as it remains exiled.
{1}{U}{B}: Level 2
Creatures you control have menace.
{2}{U}{B}: Level 3
You may play cards exiled with this Class, and you may spend mana as though it were mana of any color to cast those spells.
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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.
Gonti, Canny Acquisitor 90%
$1.51#7924
"Whenever one or more creatures you control deal combat damage to a player, look at the top card of that player's library, then exile it face down. You may play that card for as long as it remains exiled, and mana of any type can be spent to cast that spell."
Araña, Heart of the Spider 87%
$0.60#6203
"Whenever a modified creature you control deals combat damage to a player, exile the top card of your library. You may play that card this turn."
Gonti, Night Minister 86%
$1.25#2622
"Whenever a creature deals combat damage to one of your opponents, its controller looks at the top card of that opponent's library and exiles it face down. They may play that card for as long as it remains exiled. Mana of any type can be spent to cast a spell this way."
Klaw, Master of Sound 85%
$0.30#20623
"Whenever this card deals combat damage to a player, look at the top card of that player's library, then exile it face down. You may play it for as long as it remains exiled. Mana of any type can be spent to cast a spell this way."
Grotag Night-Runner 84%
$0.12#20485
"Whenever this creature deals combat damage to a player, exile the top card of your library. You may play that card this turn."
Prophetic Flamespeaker 84%
$0.44#17038
"Whenever this creature deals combat damage to a player, exile the top card of your library. You may play it this turn."
Stromkirk Occultist 84%
$0.17#9669
"Whenever this creature deals combat damage to a player, exile the top card of your library. Until end of turn, you may play that card."
Dream-Thief's Bandana 83%
$1.71#6238
"Whenever equipped creature deals combat damage to a player, look at the top card of their library, then exile it face down. For as long as it remains exiled, you may play it, and mana of any type can be spent to cast that spell."
Jeskai Infiltrator 83%
$0.16#19634
"When this creature deals combat damage to a player, exile it and the top card of your library in a face-down pile, shuffle that pile, then manifest those cards."
Nashi, Moon Sage's Scion 83%
$3.75#1949
"Whenever this card deals combat damage to a player, exile the top card of each player's library. Until end of turn, you may play one of those cards. If you cast a spell this way, pay life equal to its mana value rather than paying its mana cost."
+1 more matching line
Reno and Rude 82%
$0.23#12801
"Whenever this card deals combat damage to a player, exile the top card of that player's library. Then you may sacrifice another creature or artifact. If you do, you may play the exiled card this turn, and mana of any type can be spent to cast it."
Edward Kenway 81%
$5.86#5246
"Whenever a Vehicle you control deals combat damage to a player, look at the top card of that player's library, then exile it face down. You may play that card for as long as it remains exiled."