Dreadhound 
Creature — Demon Dog
$0.16 #5831 0.27 5.1 years
When this creature enters, mill three cards. (Put the top three cards of your library into your graveyard.)
Whenever a creature dies or a creature card is put into a graveyard from a library, each opponent loses 1 life.
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Cards similar to Dreadhound 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.
Poison-Tip Archer90%
$0.60↑#1681↑0.348.3 years↑
"Whenever another creature dies, each opponent loses 1 life."
Black Widow, Daring Operative86%
$2.96↑#21682↓0.43↑0.3 years↓
"When this card enters, mill three cards."
+1 more matching line
Polluted Cistern // Dim Oubliette85%
$0.38↑#67370.11↓2.1 years↓
"Whenever one or more cards are put into your graveyard from your library, each opponent loses 1 life for each card type among those cards."
+1 more matching line
Excavation Mole84%
$0.11↓#26255↓0.00↓6.5 years↑
"When this creature enters, mill three cards."
Necromancer's Assistant84%
$0.03↓#23347↓0.00↓12.3 years↑
"When this creature enters, mill three cards."
Venomous Hierophant84%
$0.09↓#21775↓0.06↓6.7 years↑
"When this creature enters, mill three cards."
Venomized Cat82%
$0.16#12946↓0.00↓1.1 years↓
"When this creature enters, mill two cards."
Screeching Skaab82%
$0.05↓#23833↓0.2114.7 years↑
"When this creature enters, mill two cards."
Sultai Skullkeeper82%
$0.03↓#28404↓0.11↓11.7 years↑
"When this creature enters, mill two cards."
Wailing Ghoul82%
$0.10↓#19844↓0.00↓10.2 years↑
"When this creature enters, mill two cards."
Armored Skaab82%
$0.42↑#22067↓0.00↓15.1 years↑
"When this creature enters, mill four cards."
Laboratory Brute82%
$0.05↓#26607↓0.2410.2 years↑
"When this creature enters, mill four cards."
Deathcap Marionette82%
$0.23↑#11226↓0.00↓2.9 years↓
"When this creature enters, you may mill two cards."
Mineshaft Spider82%
$0.18↑#20116↓0.00↓2.9 years↓
"When this creature enters, you may mill two cards."
Ultron the Annihilator80%
$19.57↑#12810↓0.47↑0.3 years↓
"Whenever another artifact is put into your graveyard from the battlefield or an artifact card is put into your graveyard from anywhere other than the battlefield, each opponent loses 1 life."
Scarblade Scout78%
$0.18↑#13660↓0.05↓0.7 years↓
"When this creature enters, mill two cards."
Marionette Apprentice78%
$1.77↑#565↑0.322.3 years↓
"Whenever another creature or artifact you control is put into a graveyard from the battlefield, each opponent loses 1 life."
Crawling Sensation78%
$0.25↑#3157↑0.10↓10.5 years↑
"At the beginning of your upkeep, you may mill two cards."
Crawling Infestation76%
$0.24↑#46740.10↓4.9 years
"Whenever one or more creature cards are put into your graveyard from anywhere during your turn, create a 1/1 green Insect creature token. This ability triggers only once each turn."
+1 more matching line
Sidisi, Brood Tyrant76%
$1.05↑#3567↑0.3112.1 years↑
"Whenever one or more creature cards are put into your graveyard from your library, create a 2/2 black Zombie creature token."
+1 more matching line