Mirelurk Queen 

Creature — Crab Mutant
$1.11 #4193 0.10 2.6 years
Vigilance
When this creature enters, target player gets two rad counters.
Whenever one or more nonland cards are milled, draw a card, then put a +1/+1 counter on this creature. This ability triggers only once each turn.
Click a line or tag to filter
Cards similar to Mirelurk Queen 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.
The Master, Transcendent84%
$0.62↓#5328↓0.40↑2.6 years
"When this card enters, target player gets two rad counters."
Nightkin Ambusher79%
$0.32↓#7265↓0.35↑2.6 years
"When this creature enters, target player gets four rad counters."
Returned Centaur76%
$0.05↓#21613↓0.1913.1 years↑
"When this creature enters, target player mills four cards."
Homarid Explorer76%
$0.08↓#24305↓0.078.5 years↑
"When this creature enters, target player mills four cards."
Merrow Witsniper76%
$0.28↓#26503↓0.1818.7 years↑
"When this creature enters, target player mills a card."
Pensive Professor76%
$0.38↓#5323↓0.180.5 years↓
"Whenever one or more +1/+1 counters are put on this creature, draw a card."
Dusk Legion Duelist75%
$1.63↑#2703↑0.113.5 years
"Whenever one or more +1/+1 counters are put on this creature, draw a card. This ability triggers only once each turn."
+1 more matching line
Exemplar of Light75%
$0.91↓#1124↑0.32↑1.9 years
"Whenever you put one or more +1/+1 counters on this creature, draw a card. This ability triggers only once each turn."