Underworld Cerberus 
Creature — Dog
$0.34 #24124 0.56 12.9 years
This creature can't be blocked except by three or more creatures.
Cards in graveyards can't be the targets of spells or abilities.
When this creature dies, exile it and each player returns all creature cards from their graveyard to their hand.
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Cards similar to Underworld Cerberus 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.
Rampaging Ceratops90%
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"This creature can't be blocked except by three or more creatures."
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"When this creature dies, exile it, then return another target creature card from your graveyard to your hand."
Silent Gravestone84%
$0.38↑#17956↑0.598.6 years↓
"Cards in graveyards can't be the targets of spells or abilities."
Relentless X-ATM09284%
$0.28↓#11491↑0.31↓1.2 years↓
"This creature can't be blocked except by three or more creatures."
Gorilla Berserkers82%
$0.19↓#14862↑0.07↓30.2 years↑
"This creature can't be blocked except by three or more creatures."
Troll of Khazad-dûm82%
$0.98↑#2775↑0.14↓3.2 years↓
"This creature can't be blocked except by three or more creatures."
Pathrazer of Ulamog81%
$1.24↑#2417↑0.87↑16.4 years↑
"This creature can't be blocked except by three or more creatures."
Phyrexian Colossus81%
$0.25↓#225560.07↓27.9 years↑
"This creature can't be blocked except by three or more creatures."
Ground Seal78%
$0.18↓#11076↑0.24↓24.9 years↑
"Cards in graveyards can't be the targets of spells or abilities."
Dutiful Attendant78%
$0.22↓#14994↑0.00↓11.4 years↓
"When this creature dies, return another target creature card from your graveyard to your hand."
Undead Butler78%
$0.28↓#4336↑0.03↓4.8 years↓
"When this creature dies, you may exile it. When you do, return target creature card from your graveyard to your hand."
Doombot Harbinger78%
$0.26↓#19068↑0.00↓0.2 years↓
"When this creature dies, you may exile this card. When you do, return target creature card from your graveyard to your hand."
Hexmark Destroyer76%
$0.40↑#14419↑0.25↓3.9 years↓
"This creature can't be blocked except by six or more creatures."
Guile76%
$0.80↑#11663↑0.6418.9 years↑
"This creature can't be blocked except by three or more creatures."
Carrion Thrash76%
$0.16↓#288740.19↓17.9 years↑
"When this creature dies, you may pay 
. If you do, return another target creature card from your graveyard to your hand."
. If you do, return another target creature card from your graveyard to your hand."
Iname, Life Aspect76%
$0.90↑#204510.23↓21.9 years↑
"When this card dies, you may exile it. If you do, return any number of target Spirit cards from your graveyard to your hand."
Empty the Catacombs74%
$0.34#222850.29↓20.9 years↑
"Each player returns all creature cards from their graveyard to their hand."
Dennick, Pious Apprentice // Dennick, Pious Apparition74%
$0.19↓#15231↑0.564.9 years↓
"Cards in graveyards can't be the targets of spells or abilities."
Greenwarden of Murasa73%
$0.26↓#3748↑0.43↓10.9 years↓
"When this creature dies, you may exile it. If you do, return target card from your graveyard to your hand."
Tromokratis73%
$0.19↓#4961↑0.29↓12.6 years
"this card can't be blocked unless all creatures defending player controls block it."