Kunoros, Hound of Athreos 
Legendary Creature — Dog
$0.34 #9145 0.53 6.6 years
Vigilance, menace, lifelink
Creature cards in graveyards can't enter the battlefield.
Players can't cast spells from graveyards.
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Cards similar to Kunoros, Hound of Athreos 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.
Ashes of the Abhorrent94%
$0.75↑#82770.88↑8.9 years↑
"Players can't cast spells from graveyards or activate abilities of cards in graveyards."
Grafdigger's Cage94%
$1.94↑#2085↑0.95↑14.6 years↑
"Creature cards in graveyards and libraries can't enter the battlefield."
+1 more matching line
Weathered Runestone92%
$0.33↓#81070.95↑5.6 years↓
"Players can't cast spells from graveyards or libraries."
+1 more matching line
Soulless Jailer89%
$1.31↑#3221↑0.89↑3.6 years↓
"Players can't cast noncreature spells from graveyards or exile."
+1 more matching line
Shaman's Trance78%
$0.65↑#25621↓0.5624.3 years↑
"Other players can't play lands or cast spells from their graveyards this turn. You may play lands and cast spells from other players' graveyards this turn as though those cards were in your graveyard."
Valentin, Dean of the Vein // Lisette, Dean of the Root72%
$0.96↑#77390.16↓5.4 years↓
"Menace, lifelink"
Brisela, Voice of Nightmares70%
10.1 years↑
"Flying, first strike, vigilance, lifelink"
+1 more matching line
Aerial Responder70%
$0.10↓#87430.25↓9.9 years↑
"Flying, vigilance, lifelink"