Defiant Greatmaw {2}{G}
Creature — Hippo
When this creature enters, put two -1/-1 counters on target creature you control.
Whenever you put one or more -1/-1 counters on this creature, remove a -1/-1 counter from another target creature you control.
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Cards that do something similar 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.
Plague Belcher 100%
$0.44#3640
"When this creature enters, put two -1/-1 counters on target creature you control."
+1 more matching line
Soulstinger 100%
$0.11#19198
"When this creature enters, put two -1/-1 counters on target creature you control."
+1 more matching line
Exemplar of Strength 100%
$0.22#24130
"When this creature enters, put three -1/-1 counters on target creature you control."
Channeler Initiate 100%
$0.21#6090
"When this creature enters, put three -1/-1 counters on target creature you control."
+1 more matching line
Vizier of Remedies 89%
$0.29#11647
"If one or more -1/-1 counters would be put on a creature you control, that many -1/-1 counters minus one are put on it instead."
Emptiness 89%
$0.89#13545
"When this creature enters, if {B}{B} was spent to cast it, put three -1/-1 counters on up to one target creature."
Crocodile of the Crossing 88%
$0.09#25630
"When this creature enters, put a -1/-1 counter on target creature you control."
Decimator Beetle 88%
$0.14#17909
"When this creature enters, put a -1/-1 counter on target creature you control."
+1 more matching line
Ornery Kudu 88%
$0.09#29206
"When this creature enters, put a -1/-1 counter on target creature you control."
Baleful Ammit 88%
$0.32#19585
"When this creature enters, put a -1/-1 counter on target creature you control."
Moonshadow 88%
$11.52#8935
"Whenever one or more permanent cards are put into your graveyard from anywhere while this creature has a -1/-1 counter on it, remove a -1/-1 counter from this creature."
+1 more matching line
Hapatra, Vizier of Poisons 88%
$0.33#4046
"Whenever you put one or more -1/-1 counters on a creature, create a 1/1 green Snake creature token with deathtouch."
Nest of Scarabs 88%
$4.72#3495
"Whenever you put one or more -1/-1 counters on a creature, create that many 1/1 black Insect creature tokens."
Auntie Ool, Cursewretch 87%
$0.39#6701
"Whenever one or more -1/-1 counters are put on a creature, draw a card if you control that creature. If you don't control it, its controller loses 1 life."
Cultbrand Cinder 87%
$0.10#29938
"When this creature enters, put a -1/-1 counter on target creature."
Dread Tiller 87%
$0.25#6417
"When this creature enters, put a -1/-1 counter on target creature."
+1 more matching line
Grim Poppet 87%
$0.29#8804
"Remove a -1/-1 counter from this creature: Put a -1/-1 counter on another target creature."
+1 more matching line