Scarscale Ritual {1}{U/B}
Sorcery
As an additional cost to cast this spell, put a -1/-1 counter on a creature you control.
Draw two cards.
click a line to search just that ability, click more to combine them
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.
Lethal Sting 100%
$0.25#18085
"As an additional cost to cast this spell, put a -1/-1 counter on a creature you control."
Flourishing Defenses 89%
$1.25#4096
"Whenever a -1/-1 counter is put on a creature, you may create a 1/1 green Elf Warrior creature token."
Liliana's Influence 87%
$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."
Moonshadow 87%
$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."
Melira, Sylvok Outcast 85%
$5.13#10975
"Creatures you control can't have -1/-1 counters put on them."
Magmaroth 85%
$0.10#29030
"Whenever you cast a noncreature spell, remove a -1/-1 counter from this creature."
Soul-Scar Mage 85%
$0.81#12556
"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."
Grim Poppet 85%
$0.29#8804
"Remove a -1/-1 counter from this creature: Put a -1/-1 counter on another target creature."
Encumbered Reejerey 85%
$0.13#22558
"Whenever this creature becomes tapped while it has a -1/-1 counter on it, remove a -1/-1 counter from it."
The Reaper, King No More 84%
$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."
Vizier of Remedies 84%
$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."
Lichenthrope 84%
$0.60#28461
"If damage would be dealt to this creature, put that many -1/-1 counters on it instead."
Necroskitter 83%
$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."
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."
Sturdy Hatchling 82%
$0.13#28241
"Whenever you cast a blue spell, remove a -1/-1 counter from this creature."
Shrewd Hatchling 82%
$0.08#27480
"Whenever you cast a blue spell, remove a -1/-1 counter from this creature."
Ammit Eternal 82%
$1.18#11132
"Whenever an opponent casts a spell, put a -1/-1 counter on this creature."