Erithizon 


Creature — Beast
Whenever this creature attacks, put a +1/+1 counter on target creature of defending player's choice.
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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.
Gnoll Hunter 87%
$0.12#22961
"Whenever this creature attacks, if you attacked with creatures with total power 6 or greater this combat, put a +1/+1 counter on this creature."
Bulwark Ox 86%
$0.36#7273
"Whenever this creature attacks while saddled, put a +1/+1 counter on target creature."
Thundering Raiju 85%
$0.54#4014
"Whenever this creature attacks, put a +1/+1 counter on target creature you control. Then this creature deals X damage to each opponent, where X is the number of modified creatures you control other than this creature."
Giant Beaver 83%
$0.14#18275
"Whenever this creature attacks while saddled, put a +1/+1 counter on target creature that saddled it this turn."
High-Society Hunter 82%
$0.32#4502
"Whenever this creature attacks, you may sacrifice another creature. If you do, put a +1/+1 counter on this creature."
Resplendent Griffin 81%
$0.09#28236
"Whenever this creature attacks, if you have the city's blessing, put a +1/+1 counter on it."
Beetle-Headed Merchants 80%
$0.08#18877
"Whenever this creature attacks, you may sacrifice another creature or artifact. If you do, draw a card and put a +1/+1 counter on this creature."
Ranger Class 80%
$0.43#7487
"Whenever you attack, put a +1/+1 counter on target attacking creature."
Araña, Heart of the Spider 80%
$0.60#6203
"Whenever you attack, put a +1/+1 counter on target attacking creature."
Surgical Suite // Hospital Room 80%
$0.23#8463
"Whenever you attack, put a +1/+1 counter on target attacking creature."
Leader's Talent 80%
$0.71#10906
"Whenever you attack, put a +1/+1 counter on target attacking creature."