Rush of Knowledge 

Sorcery
$0.17 #9481 0.13 23.4 years
Draw cards equal to the greatest mana value among permanents you control.
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Cards similar to Rush 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.
One with the Machine86%
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"Draw cards equal to the greatest mana value among artifacts you control."
Lunar Insight81%
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"Draw a card for each different mana value among nonland permanents you control."
Traverse Eternity78%
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"Draw cards equal to the greatest mana value among historic permanents you control."
Morbid Curiosity77%
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"Draw cards equal to the mana value of the sacrificed permanent."
Heed the Mists76%
$0.19↑#25850↓0.00↓21.7 years↓
"Mill a card, then draw cards equal to the milled card's mana value."
Ugin's Insight75%
$0.20↑#92480.28↑11.0 years↓
"Scry X, where X is the greatest mana value among permanents you control, then draw three cards."
Sudden Insight74%
$0.06↓#23041↓0.00↓5.2 years↓
"Draw a card for each different mana value among nonland cards in your graveyard."
Stinging Study72%
$10.63↑#3418↑0.185.5 years↓
"You draw X cards and you lose X life, where X is the mana value of a commander you own on the battlefield or in the command zone."
Interpret the Signs71%
$0.12↓#14104↓0.43↑12.5 years↓
"Scry 3, then reveal the top card of your library. Draw cards equal to that card's mana value."
Overwhelming Intellect70%
$0.20↑#18052↓0.31↑21.4 years↓
"Counter target creature spell. Draw cards equal to that spell's mana value."