Platypus-Bear {1}{G/U}
Creature — Platypus Bear
Defender
When this creature enters, mill two cards. (Put the top two cards of your library into your graveyard.)
As long as there is a Lesson card in your graveyard, this creature can attack as though it didn't have defender.
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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.
Demon Wall 86%
$0.23#16021
"As long as this creature has a counter on it, it can attack as though it didn't have defender."
+1 more matching line
Goblin Cohort 85%
$0.24#24308
"This creature can't attack unless you've cast a creature spell this turn."
Mogg Conscripts 85%
#27105
"This creature can't attack unless you've cast a creature spell this turn."
Bloodcrazed Goblin 84%
$0.18#25197
"This creature can't attack unless an opponent has been dealt damage this turn."
Faithbound Judge // Sinner's Judgment 83%
$0.78#11161
"As long as this creature has three or more judgment counters on it, it can attack as though it didn't have defender."
Silburlind Snapper 82%
$0.04#26997
"This creature can't attack unless you've cast a noncreature spell this turn."
Karsus Depthguard 82%
$0.05#22562
"As long as this creature's power is 5 or greater, it can attack as though it didn't have defender."
+1 more matching line
Mogg Toady 82%
$0.11#30572
"This creature can't attack unless you control more creatures than defending player."
Goblin Goon 82%
$0.35#20282
"This creature can't attack unless you control more creatures than defending player."
Novice Knight 82%
$0.12#23011
"As long as this creature is enchanted or equipped, it can attack as though it didn't have defender."
+1 more matching line
Orcish Conscripts 81%
#30294
"This creature can't attack unless at least two other creatures attack."
Bloodthirster 81%
$32.32#2531
"This creature can't attack a player it has already attacked this turn."