Novice Knight 
Creature — Human Knight
Defender (This creature can't attack.)
As long as this creature is enchanted or equipped, it 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.
Pillar of War 96%
$0.07#30018
"As long as this creature is enchanted, it can attack as though it didn't have defender."
+1 more matching line
Godhunter Octopus 89%
$0.06#27900
"This creature can't attack unless defending player controls an enchantment or an enchanted permanent."
Warmonger's Chariot 87%
$0.30#19177
"As long as equipped creature has defender, it can attack as though it didn't have defender."
Floodtide Serpent 86%
$0.06#29779
"This creature can't attack unless you return an enchantment you control to its owner's hand."
Karsus Depthguard 84%
$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
Demon Wall 83%
$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
Faithbound Judge // Sinner's Judgment 82%
$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."
Goblin Cohort 82%
$0.24#24308
"This creature can't attack unless you've cast a creature spell this turn."
Mogg Conscripts 82%
#27105
"This creature can't attack unless you've cast a creature spell this turn."
Silburlind Snapper 82%
$0.04#26997
"This creature can't attack unless you've cast a noncreature spell this turn."
Platypus-Bear 82%
$0.06#22912
"As long as there is a Lesson card in your graveyard, this creature can attack as though it didn't have defender."
+1 more matching line
Bloodcrazed Goblin 82%
$0.18#25197
"This creature can't attack unless an opponent has been dealt damage this turn."
Orcish Conscripts 80%
#30294
"This creature can't attack unless at least two other creatures attack."