Resplendent Griffin {1}{W}{U}
Creature — Griffin
Flying
Ascend (If you control ten or more permanents, you get the city's blessing for the rest of the game.)
Whenever this creature attacks, if you have the city's blessing, put a +1/+1 counter on it.
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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 89%
$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."
District Mascot 85%
$0.35#7180
"Whenever this creature attacks while saddled, put a +1/+1 counter on it."
Beetle-Headed Merchants 84%
$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."
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."
+1 more matching line
Sun-Blessed Guardian // Furnace-Blessed Conqueror 82%
$0.09#26825
"Whenever this creature attacks, create a tapped and attacking token that's a copy of it. Put a +1/+1 counter on that token for each +1/+1 counter on this creature. Sacrifice that token at the beginning of the next end step."
Erithizon 81%
$0.39#31125
"Whenever this creature attacks, put a +1/+1 counter on target creature of defending player's choice."
Heir of the Wilds 80%
$0.24#16000
"Whenever this creature attacks, if you control a creature with power 4 or greater, this creature gets +1/+1 until end of turn."
Slumbering Dragon 80%
$2.40#12250
"Whenever a creature attacks you or a planeswalker you control, put a +1/+1 counter on this creature."
Redemptor Dreadnought 80%
$0.34#16858
"Whenever this creature attacks, if a card is exiled with it, it gets +X/+X until end of turn, where X is the power of the exiled card."