Hellcarver Demon 
Creature — Demon
$7.07 #13469 0.13 16.5 years
Flying
Whenever this creature deals combat damage to a player, sacrifice all other permanents you control and discard your hand. Exile the top six cards of your library. You may cast any number of spells from among cards exiled this way without paying their mana costs.
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Cards similar to Hellcarver Demon 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.
The Infamous Cruelclaw83%
$1.52↓#5439↑0.53↑2.2 years↓
"Whenever this card deals combat damage to a player, exile cards from the top of your library until you exile a nonland card. You may cast that card by discarding a card rather than paying its mana cost."
Skyway Robber82%
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"Flying"
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"Flying"
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$0.35↓#144660.31↑13.3 years↓
"Flying"
Diluvian Primordial76%
$0.24↓#3761↑0.35↑13.7 years↓
"Flying"
Kaervek's Spite74%
$2.71↓#23893↓0.33↑29.7 years↑
"As an additional cost to cast this spell, sacrifice all permanents you control and discard your hand."
Maelstrom Archangel74%
$0.78↓#6571↑0.24↑17.7 years↑
"Whenever this creature deals combat damage to a player, you may cast a spell from your hand without paying its mana cost."
Drinker of Sorrow74%
$2.59↓#131280.0623.7 years↑
"Whenever this creature deals combat damage, sacrifice a permanent."
Souls of the Lost72%
$0.32↓#10236↑0.00↓2.9 years↓
"As an additional cost to cast this spell, discard a card or sacrifice a permanent."
Markov Dreadknight72%
$0.15↓#23714↓0.0610.5 years↓
"Flying"
Demonlord of Ashmouth70%
$0.28↓#21543↓0.00↓14.5 years↓
"Flying"
Fatehold Chronologist // Peer Review70%
$0.11↓#21980↓0.01↓0.0 years↓
"Flying"
Evercoat Ursine70%
$0.43↓#5065↑0.43↑2.2 years↓
"Whenever this creature deals combat damage to a player, if there are cards exiled with it, you may play one of them without paying its mana cost."
Balshan Griffin70%
$0.21↓#32083↓0.0625.1 years↑
"Flying"