Rogue Kavu 

Creature — Kavu
Whenever this creature attacks alone, it gets +2/+0 until end of 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.
Lurking Nightstalker 91%
$0.25#31306
"Whenever this creature attacks, it gets +2/+0 until end of turn."
Borderland Marauder 91%
$0.07#22582
"Whenever this creature attacks, it gets +2/+0 until end of turn."
Reckless Ogre 88%
$0.12#31389
"Whenever this creature attacks alone, it gets +3/+0 until end of turn."
Reckless Pangolin 88%
$0.12#31018
"Whenever this creature attacks, it gets +1/+1 until end of turn."
Alacrian Jaguar 88%
$0.11#21960
"Whenever this creature attacks while saddled, it gets +2/+2 until end of turn."
The Long Reach of Night // Animus of Night's Reach 88%
$0.22#11099
"Whenever this creature attacks, it gets +X/+0 until end of turn, where X is the number of creature cards in defending player's graveyard."