Bright-Palm, Soul Awakener {1}{R}{G}{W}
Legendary Creature — Fox Shaman
Backup 1 (When this creature enters, put a +1/+1 counter on target creature. If that's another creature, it gains the following ability until end of turn.)
Whenever this creature attacks, double the number of +1/+1 counters on target creature. That creature can't be blocked by creatures with power 2 or less this turn.
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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.
Ornery Tumblewagg 89%
$0.36#4872
"Whenever this creature attacks while saddled, double the number of +1/+1 counters on target creature."
+1 more matching line
Big Mother Mouser 86%
$2.07#6054
"Whenever this creature attacks, double the number of +1/+1 counters on it."
Level Up 81%
$2.13#5098
"Enchanted creature has "Whenever this creature attacks, double the number of +1/+1 counters on it. Then if it has power 10 or greater, draw a card.""