Air Nomad Student 

Creature — Human Monk
Flying
At the beginning of your end step, if this creature didn't attack this turn, 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.
Mad Dog 82%
$0.10#28544
"At the beginning of your end step, if this creature didn't attack or come under your control this turn, sacrifice it."
Scuttlegator 80%
$0.12#20712
"As long as this creature has a +1/+1 counter on it, it can attack as though it didn't have defender."
Skyclave Sentinel 80%
$0.08#23875
"As long as this creature has a +1/+1 counter on it, it can attack as though it didn't have defender."