Lockjaw Snapper {4}
Artifact Creature — Scarecrow
Wither (This deals damage to creatures in the form of -1/-1 counters.)
When this creature dies, put a -1/-1 counter on each creature with a -1/-1 counter on it.
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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.
Grief Tyrant 90%
$0.19#25487
"When this creature dies, put a -1/-1 counter on target creature for each -1/-1 counter on this creature."
Retched Wretch 90%
$0.16#21677
"When this creature dies, if it had a -1/-1 counter on it, return it to the battlefield under its owner's control and it loses all abilities."
Soulstinger 90%
$0.11#19198
"When this creature dies, you may put a -1/-1 counter on target creature for each -1/-1 counter on this creature."
Oft-Nabbed Goat 88%
$0.29#6334
"When this creature dies, if it had one or more -1/-1 counters on it, its owner draws that many cards and each other player loses that much life."
Shambling Swarm 88%
$0.54#25076
"When this creature dies, distribute three -1/-1 counters among one, two, or three target creatures. For each -1/-1 counter you put on a creature this way, remove a -1/-1 counter from that creature at the beginning of the next end step."
Vizier of Remedies 87%
$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."
Moonshadow 86%
$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."
Auntie Ool, Cursewretch 86%
$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."
Blowfly Infestation 85%
$0.38#3152
"Whenever a creature dies, if it had a -1/-1 counter on it, put a -1/-1 counter on target creature."
Necroskitter 85%
$0.71#2975
"Whenever a creature an opponent controls with a -1/-1 counter on it dies, you may return that card to the battlefield under your control."
+1 more matching line
The Reaper, King No More 85%
$0.69#6269
"Whenever a creature an opponent controls with a -1/-1 counter on it dies, you may put that card onto the battlefield under your control. Do this only once each turn."
Defiant Greatmaw 83%
$0.18#21332
"Whenever you put one or more -1/-1 counters on this creature, remove a -1/-1 counter from another target creature you control."
Grim Poppet 83%
$0.29#8804
"Remove a -1/-1 counter from this creature: Put a -1/-1 counter on another target creature."
Encumbered Reejerey 82%
$0.13#22558
"Whenever this creature becomes tapped while it has a -1/-1 counter on it, remove a -1/-1 counter from it."
Dread Tiller 81%
$0.25#6417
"Whenever a creature with a -1/-1 counter on it dies, you may put a land card from your hand or graveyard onto the battlefield tapped."
Hapatra, Vizier of Poisons 81%
$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."
Liliana's Influence 81%
$0.35#14135
"Put a -1/-1 counter on each creature you don't control. You may search your library and/or graveyard for a card named Liliana, Death Wielder, reveal it, and put it into your hand. If you search your library this way, shuffle."