Soul-Scar Mage 
Creature — Human Wizard
Prowess
If a source you control would deal noncombat damage to a creature an opponent controls, put that many -1/-1 counters on that creature instead.
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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.
Lichenthrope 92%
$0.60#28461
"If damage would be dealt to this creature, put that many -1/-1 counters on it instead."
Vizier of Remedies 91%
$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."
Nest of Scarabs 90%
$4.72#3495
"Whenever you put one or more -1/-1 counters on a creature, create that many 1/1 black Insect creature tokens."
Hapatra, Vizier of Poisons 89%
$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."
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."
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."
Encumbered Reejerey 87%
$0.13#22558
"Whenever this creature becomes tapped while it has a -1/-1 counter on it, remove a -1/-1 counter from it."
Defiant Greatmaw 86%
$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."
Lethal Sting 85%
$0.25#18085
"As an additional cost to cast this spell, put a -1/-1 counter on a creature you control."
Scarscale Ritual 85%
$0.13#24100
"As an additional cost to cast this spell, put a -1/-1 counter on a creature you control."
Flourishing Defenses 84%
$1.25#4096
"Whenever a -1/-1 counter is put on a creature, you may create a 1/1 green Elf Warrior creature token."
Magmaroth 84%
$0.10#29030
"Whenever you cast a noncreature spell, remove a -1/-1 counter from this creature."
Grim Poppet 84%
$0.29#8804
"Remove a -1/-1 counter from this creature: Put a -1/-1 counter on another target creature."
Ammit Eternal 84%
$1.18#11132
"Whenever this creature deals combat damage to a player, remove all -1/-1 counters from it."
Quagmire Lamprey 84%
$0.20#30057
"Whenever this creature becomes blocked by a creature, put a -1/-1 counter on that creature."
Phyrexian Hydra 83%
$4.55#12616
"If damage would be dealt to this creature, prevent that damage. Put a -1/-1 counter on this creature for each 1 damage prevented this way."
Segmented Wurm 83%
$0.23#31593
"Whenever this creature becomes the target of a spell or ability, put a -1/-1 counter on it."
Obelisk Spider 83%
$2.79#4921
"Whenever this creature deals combat damage to a creature, put a -1/-1 counter on that creature."