Fevered Suspicion 
Sorcery
$2.24 #5506 0.48 5.1 years
Each opponent exiles cards from the top of their library until they exile a nonland card. You may cast any number of spells from among those nonland cards without paying their mana costs.
Rebound (If you cast this spell from your hand, exile it as it resolves. At the beginning of your next upkeep, you may cast this card from exile without paying its mana cost.)
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Cards similar to Fevered Suspicion 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.
Stolen Goods94%
$0.25↓#9128↓0.92↑14.3 years↑
"Target opponent exiles cards from the top of their library until they exile a nonland card. Until end of turn, you may cast that card without paying its mana cost."
Dream Harvest92%
$0.38↓#64620.00↓0.6 years↓
"Each opponent exiles cards from the top of their library until they have exiled cards with total mana value 5 or greater this way. Until end of turn, you may cast cards exiled this way without paying their mana costs."
Etali, Primal Conqueror // Etali, Primal Sickness92%
$25.50↑#799↑1.65↑3.4 years↓
"When this card enters, each player exiles cards from the top of their library until they exile a nonland card. You may cast any number of spells from among the nonland cards exiled this way without paying their mana costs."
Plargg and Nassari91%
$0.30↓#2290↑0.463.3 years↓
"At the beginning of your upkeep, each player exiles cards from the top of their library until they exile a nonland card. An opponent chooses a nonland card exiled this way. You may cast up to two spells from among the other cards exiled this way without paying their mana costs."
Villainous Wealth91%
$0.29↓#2406↑0.63↑11.9 years↑
"Target opponent exiles the top X cards of their library. You may cast any number of spells with mana value X or less from among them without paying their mana costs."
Etali, Primal Storm89%
$0.44↓#266↑0.85↑8.6 years↑
"Whenever this card attacks, exile the top card of each player's library, then you may cast any number of spells from among those cards without paying their mana costs."
Ensnared by the Mara88%
$7.61↑#3385↑0.482.9 years↓
"Each opponent faces a villainous choice — They exile cards from the top of their library until they exile a nonland card, then you may cast that card without paying its mana cost, or that player exiles the top four cards of their library and this card deals damage equal to the total mana value of those exiled cards to that player."
Stolen Strategy88%
$0.34↓#45630.65↑8.2 years↑
"At the beginning of your upkeep, exile the top card of each opponent's library. Until end of turn, you may cast spells from among those exiled cards, and you may spend mana as though it were mana of any color to cast those spells."
Mind's Dilation87%
$0.40↓#2656↑0.76↑10.1 years↑
"Whenever an opponent casts their first spell each turn, that player exiles the top card of their library. If it's a nonland card, you may cast it without paying its mana cost."
Outrageous Robbery86%
$0.38↓#47110.402.6 years↓
"Target opponent exiles the top X cards of their library face down. You may look at and play those cards for as long as they remain exiled. If you cast a spell this way, you may spend mana as though it were mana of any type to cast it."
Trumpeting Herd86%
$0.14↓#24841↓0.00↓7.2 years↑
"Rebound If you cast this spell from your hand, exile it as it resolves. At the beginning of your next upkeep, you may cast this card from exile without paying its mana cost."
Ojutai's Summons86%
$0.03↓#27133↓0.11↓11.4 years↑
"Rebound If you cast this spell from your hand, exile it as it resolves. At the beginning of your next upkeep, you may cast this card from exile without paying its mana cost."
Xander's Pact84%
$0.30↓#16584↓0.19↓4.4 years
"Each opponent exiles the top card of their library. You may cast spells from among those cards this turn. If you cast a spell this way, pay life equal to that spell's mana value rather than pay its mana cost."
Extract Power84%
$0.31↓#16410↓0.00↓0.2 years↓
"Look at the top card of each player's library, then exile those cards face down. You may play them without paying their mana costs for as long as they remain exiled."
Inside Information84%
$2.87↑#14825↓0.00↓0.1 years↓
"Exile the top X cards of target opponent's library. You may play those cards this turn. If you cast a spell this way, pay life equal to its mana value rather than pay its mana cost."
Sight Beyond Sight84%
$0.07↓#26302↓0.25↓11.4 years↑
"Rebound If you cast this spell from your hand, exile it as it resolves. At the beginning of your next upkeep, you may cast this card from exile without paying its mana cost."
Great Teacher's Decree84%
$0.10↓#25685↓0.27↓11.4 years↑
"Rebound If you cast this spell from your hand, exile it as it resolves. At the beginning of your next upkeep, you may cast this card from exile without paying its mana cost."
Nicol Bolas, God-Pharaoh83%
$3.09↑#58290.91↑9.1 years↑
"+2: Target opponent exiles cards from the top of their library until they exile a nonland card. Until end of turn, you may cast that card without paying its mana cost."
Faithless Salvaging83%
$0.17↓#8690↓0.36↓5.2 years
"Rebound If you cast this spell from your hand, exile it as it resolves. At the beginning of your next upkeep, you may cast this card from exile without paying its mana cost."
Nomads' Assembly82%
$0.55↓#11977↓0.00↓16.4 years↑
"Rebound If you cast this spell from your hand, exile it as it resolves. At the beginning of your next upkeep, you may cast this card from exile without paying its mana cost."