Moon-Circuit Hacker {1}{U}
Enchantment Creature — Human Ninja
Ninjutsu {U} ({U}, Return an unblocked attacker you control to hand: Put this card onto the battlefield from your hand tapped and attacking.)
Whenever this creature deals combat damage to a player, you may draw a card. If you do, discard a card unless this creature entered 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.
Daring Saboteur 92%
$0.23#10729
"Whenever this creature deals combat damage to a player, you may draw a card. If you do, discard a card."
Abomination of Gudul 92%
$0.05#27101
"Whenever this creature deals combat damage to a player, you may draw a card. If you do, discard a card."
Jeskai Elder 92%
$0.16#18047
"Whenever this creature deals combat damage to a player, you may draw a card. If you do, discard a card."
Wharf Infiltrator 92%
$0.37#6458
"Whenever this creature deals combat damage to a player, you may draw a card. If you do, discard a card."
Ninja of the Deep Hours 91%
$2.04#3480
"Whenever this creature deals combat damage to a player, you may draw a card."
+1 more matching line
Shadowmage Infiltrator 91%
$0.40#5436
"Whenever this creature deals combat damage to a player, you may draw a card."
Ohran Viper 91%
$1.24#7575
"Whenever this creature deals combat damage to a player, you may draw a card."
Broodbirth Viper 91%
$0.57#12828
"Whenever this creature deals combat damage to a player, you may draw a card."
Hystrodon 91%
$1.54#19820
"Whenever this creature deals combat damage to a player, you may draw a card."
Neurok Commando 91%
$0.05#18562
"Whenever this creature deals combat damage to a player, you may draw a card."
Vanguard Suppressor 89%
$0.75#8841
"Whenever this creature deals combat damage to a player, draw a card."
Sea-Dasher Octopus 89%
$1.21#4643
"Whenever this creature deals combat damage to a player, draw a card."
Oakhame Adversary 89%
$0.24#6159
"Whenever this creature deals combat damage to a player, draw a card."
Sure-Footed Infiltrator 89%
$0.14#16631
"Whenever this creature deals combat damage to a player, draw a card."
Lambholt Elder // Silverpelt Werewolf 89%
$0.13#18281
"Whenever this creature deals combat damage to a player, draw a card."
Suspicious Stowaway // Seafaring Werewolf 89%
$0.16#15739
"Whenever this creature deals combat damage to a player, draw a card."