Fervent Mastery 
Sorcery
$0.29 #12487 0.20 5.4 years
You may pay 
rather than pay this spell's mana cost.
rather than pay this spell's mana cost.If the cost was paid, an opponent discards any number of cards, then draws that many cards.
cost was paid, an opponent discards any number of cards, then draws that many cards.Search your library for up to three cards, put them into your hand, shuffle, then discard three cards at random.
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Cards similar to Fervent Mastery 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.
Gamble94%
$15.62↑#240↑0.76↑27.9 years↑
"Search your library for a card, put that card into your hand, discard a card at random, then shuffle."
Demonic Collusion83%
$3.40↑#15273↓0.1219.9 years↑
"Search your library for a card, put that card into your hand, then shuffle."
Cool but Rude82%
$7.10↑#4950↑0.00↓0.5 years↓
"When this Class becomes level 3, search your library for a card, put it into your hand, shuffle, then discard a card at random."
+1 more matching line
Diabolic Tutor82%
$1.10↑#481↑0.50↑24.9 years↑
"Search your library for a card, put that card into your hand, then shuffle."
Demonic Tutor82%
$58.70↑#62↑1.58↑33.1 years↑
"Search your library for a card, put that card into your hand, then shuffle."
Behold the Beyond81%
$0.96↑#129350.38↑10.4 years↑
"Discard your hand. Search your library for three cards, put them into your hand, then shuffle."
Razaketh's Rite80%
$0.29#101490.10↓9.1 years↑
"Search your library for a card, put that card into your hand, then shuffle."
Diabolic Intent80%
$15.95↑#271↑0.74↑25.6 years↑
"Search your library for a card, put that card into your hand, then shuffle."
Diabolic Revelation78%
$3.84↑#8668↑0.36↑14.1 years↑
"Search your library for up to X cards, put those cards into your hand, then shuffle."
Rune-Scarred Demon78%
$0.80↑#1293↑0.54↑15.1 years↑
"When this creature enters, search your library for a card, put it into your hand, then shuffle."
Bringer of the Black Dawn78%
$1.09↑#147290.45↑22.3 years↑
"You may pay 
rather than pay this spell's mana cost."
rather than pay this spell's mana cost."
Wild Research77%
$1.52↑#16080↓0.36↑25.3 years↑
"
: Search your library for an instant card and reveal that card. Put it into your hand, then discard a card at random. Then shuffle."
: Search your library for an instant card and reveal that card. Put it into your hand, then discard a card at random. Then shuffle."
Reckless Handling77%
$0.36↑#2702↑0.243.3 years↓
"Search your library for an artifact card, reveal it, put it into your hand, shuffle, then discard a card at random. If an artifact card was discarded this way, this card deals 2 damage to each opponent."
Emeritus of Woe // Demonic Tutor76%
$11.77↑#3484↑1.58↑0.4 years↓
"Search your library for a card, put that card into your hand, then shuffle."
Verdant Mastery76%
$0.23↓#121320.00↓5.4 years
"You may pay rather than pay this spell's mana cost."
rather than pay this spell's mana cost."
Splinter's Technique75%
$2.03↑#5706↑0.00↓0.5 years↓
"Search your library for a card, put that card into your hand, then shuffle."
+1 more matching line
Illicit Shipment74%
$0.29#102490.47↑4.4 years↓
"Search your library for a card, put it into your hand, then shuffle."
Demonic Bargain74%
$0.27↓#146490.114.8 years
"Exile the top thirteen cards of your library, then search your library for a card. Put that card into your hand, then shuffle."
Mastermind's Acquisition74%
$1.51↑#8522↑0.53↑8.6 years↑
"• Search your library for a card, put it into your hand, then shuffle."
Ingenious Mastery74%
$0.25↓#116340.36↑5.4 years
"You may pay rather than pay this spell's mana cost."
rather than pay this spell's mana cost."