Trial of Knowledge 
Enchantment
$0.17 #22228 0.00 9.5 years
When this enchantment enters, draw three cards, then discard a card.
When a Cartouche you control enters, return this enchantment to its owner's hand.
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Cards similar to Trial of Knowledge 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.
Rain of Revelation92%
$0.18↑#14042↑0.007.4 years↓
"Draw three cards, then discard a card."
Enhanced Awareness92%
$0.11↓#259590.0611.7 years↑
"Draw three cards, then discard a card."
Ancestral Reminiscence92%
$0.20↑#12546↑0.21↑2.9 years↓
"Draw three cards, then discard a card."
Meat Locker // Drowned Diner90%
$0.16↓#8934↑0.072.1 years↓
"When you unlock this door, draw three cards, then discard a card."
Sift88%
$0.04↓#183800.0628.6 years↑
"Draw three cards, then discard a card."
Trial of Strength88%
$0.09↓#28922↓0.079.5 years
"When a Cartouche you control enters, return this enchantment to its owner's hand."
Focus the Mind86%
$0.26↑#9600↑0.001.5 years↓
"Draw three cards, then discard a card."
Unexpected Assistance86%
$0.25↑#10760↑0.12↑0.7 years↓
"Draw three cards, then discard a card."
Trial of Ambition82%
$0.14↓#252670.079.5 years
"When a Cartouche you control enters, return this enchantment to its owner's hand."
Invasion of Vryn // Overloaded Mage-Ring82%
$0.18↑#15094↑0.38↑3.5 years↓
"When this Siege enters, draw three cards, then discard a card."
Marang River Regent // Coil and Catch81%
$1.43↑#3148↑0.26↑1.5 years↓
"Draw three cards, then discard a card."
Timeline Inquiry81%
$0.24↑#257060.20↑0.3 years↓
"Draw three cards. Then discard a card unless this spell was cast using teamwork."
Trial of Solidarity80%
$0.08↓#29020↓0.20↑9.5 years
"When a Cartouche you control enters, return this enchantment to its owner's hand."
Trial of Zeal78%
$0.11↓#29037↓0.009.5 years
"When a Cartouche you control enters, return this enchantment to its owner's hand."
Roiling Dragonstorm78%
$0.21↑#5367↑0.061.5 years↓
"When this enchantment enters, draw two cards, then discard a card."
+1 more matching line
Attunement78%
$21.07↑#15580↑0.14↑28.0 years↑
"Return this enchantment to its owner's hand: Draw three cards, then discard four cards."
Archwing Dragon78%
$0.38↑#16960↑0.0014.5 years↑
"At the beginning of the end step, return this creature to its owner's hand."
Pore Over the Pages78%
$0.09↓#13003↑0.0610.6 years↑
"Draw three cards, untap up to two lands, then discard a card."
Bellowing Crier77%
$0.19↑#9070↑0.002.2 years↓
"When this creature enters, draw a card, then discard a card."
Merfolk Traders77%
$0.12↓#28346↓0.13↑29.4 years↑
"When this creature enters, draw a card, then discard a card."