Downwind Ambusher 

Creature — Skunk Assassin
Flash
When this creature enters, choose one —
• Target creature an opponent controls gets -1/-1 until end of turn.
• Destroy target creature an opponent controls that was dealt damage this turn.
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.
Shambling Ghast 100%
$0.43#3264
"• Target creature an opponent controls gets -1/-1 until end of turn."
Cemetery Desecrator 94%
$0.34#17330
"• Target creature an opponent controls gets -X/-X until end of turn, where X is the mana value of the exiled card."
Thornmantle Striker 93%
$0.19#22124
"• Target creature an opponent controls gets -X/-X until end of turn, where X is the number of Elves you control."
+1 more matching line
Wail of War 85%
$0.16#14312
"• Creatures target opponent controls get -1/-1 until end of turn."
+1 more matching line
Giant-Sized Flying Ant 100%
$0.10#26433
"When this creature enters, choose one —"
+1 more matching line