Infesting Radroach 

Creature — Insect Mutant
Flying
This creature can't block.
Whenever this creature deals combat damage to a player, they get that many rad counters.
Whenever an opponent mills a nonland card, if this creature is in your graveyard, you may return it to your hand.
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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.
Vexing Radgull 92%
$0.56#4648
"Whenever this creature deals combat damage to a player, that player gets two rad counters if they don't have any rad counters. Otherwise, proliferate."
Glowing One 91%
$2.42#4458
"Whenever this creature deals combat damage to a player, they get four rad counters."
Dogged Detective 81%
$0.23#6751
"Whenever an opponent draws their second card each turn, you may return this card from your graveyard to your hand."