Tar Fiend 
Creature — Elemental
$0.35 #25241 0.62 17.9 years
Devour 2 (As this creature enters, you may sacrifice any number of creatures. It enters with twice that many +1/+1 counters on it.)
When this creature enters, target player discards a card for each creature it devoured.
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Cards similar to Tar Fiend 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.
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+1 more matching line
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Thunder-Thrash Elder96%
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"Devour 3"
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$0.25↓#231920.6017.9 years
"Devour 1"
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$0.39↑#2105↑0.22↓17.9 years
"Devour 2"
Bloodspore Thrinax92%
$0.32↓#9187↑0.5610.8 years↓
"Devour 1"
Ravenous Gigantotherium92%
$0.26↓#215520.676.4 years↓
"Devour 3"
Thorn-Thrash Viashino90%
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"Devour 2"
Skullmulcher89%
$0.09↓#16792↑0.24↓17.9 years
"Devour 1"
+1 more matching line
Ribtruss Roaster88%
$0.34↓#7305↑0.00↓0.4 years↓
"Devour 1"
Hellkite Hatchling88%
$0.15↓#237470.29↓17.6 years
"Devour 1"
Preyseizer Dragon87%
$0.37↑#18626↑0.00↓14.3 years↓
"Devour 2"
Voracious Dragon86%
$0.51↑#17656↑0.20↓17.6 years
"Devour 1"
Fell Beast of Mordor85%
$0.90↑#9779↑0.06↓2.8 years↓
"Devour 1"
Feaster of Fools84%
$0.25↓#212610.16↓7.2 years↓
"Devour 2"
Mournwhelk84%
$0.29↓#249040.5318.9 years
"When this creature enters, target player discards two cards."
Thromok the Insatiable84%
$2.82↑#15351↑0.25↓14.3 years↓
"Devour X, where X is the number of creatures devoured this way"
Caprichrome83%
$0.11↓#265280.21↓5.2 years↓
"Devour artifact 1"