Flitterwing Nuisance {U}
Creature — Faerie Rogue
Flying
This creature enters with a -1/-1 counter on it.
{2}{U}, Remove a counter from this creature: Whenever a creature you control deals combat damage to a player or planeswalker this turn, draw a card.
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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.
Glen Elendra Guardian 100%
$0.41#6372
"This creature enters with a -1/-1 counter on it."
+1 more matching line
Loch Mare 87%
$0.76#15240
"{1}{U}, Remove a counter from this creature: Draw a card."
+1 more matching line
Hotheaded Giant 86%
$0.04#31117
"This creature enters with two -1/-1 counters on it unless you've cast another red spell this turn."
Patched Plaything 86%
$0.20#20788
"This creature enters with two -1/-1 counters on it if you cast it from your hand."