Infesting Radroach 

Creature — Insect Mutant
$1.34 #5099 0.44 2.6 years
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 similar to Infesting Radroach 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.
Glowing One90%
$1.49↑#46240.56↑2.6 years
"Whenever this creature deals combat damage to a player, they get four rad counters."
+1 more matching line
Squee, Goblin Nabob80%
$0.27↓#3896↑0.09↓27.0 years↑
"At the beginning of your upkeep, you may return this card from your graveyard to your hand."
Crosstown Courier80%
$0.04↓#25183↓0.4314.0 years↑
"Whenever this creature deals combat damage to a player, that player mills that many cards."
Vexing Radgull78%
$0.90↓#48100.452.6 years
"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."