Fire Lord Ozai 

Legendary Creature — Human Noble
$1.02 #10036 0.00 0.8 years
Whenever Fire Lord Ozai attacks, you may sacrifice another creature. If you do, add an amount of
equal to the sacrificed creature's power. Until end of combat, you don't lose this mana as steps end.
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Cards similar to Fire Lord Ozai 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.
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"
,
: Target opponent exiles the top card of their library. Until end of turn, you may play that card."
Etali, Primal Storm86%
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"
,
: Target opponent exiles the top card of their library. You may play that card this turn."
Stolen Strategy84%
$0.34↓#4563↑0.65↑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."
Mindleecher82%
$0.42↓#100960.44↑6.4 years↑
"Whenever this creature mutates, exile the top card of each opponent's library face down. You may look at and play those cards for as long as they remain exiled."
Brainstealer Dragon81%
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"At the beginning of your end step, exile the top card of each opponent's library. You may 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 color to cast it."
Mezzio Mugger81%
$0.33↓#12858↓0.074.4 years↑
"Whenever this creature attacks, exile the top card of each player's library. You may play those cards this turn, and you may spend mana as though it were mana of any color to cast those spells."
Mind's Dilation81%
$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."
Extract Power80%
$0.31↓#16410↓0.000.2 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."
Dream Harvest80%
$0.38↓#6462↑0.000.6 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."
Gix, Yawgmoth Praetor80%
$0.49↓#1999↑0.53↑3.8 years↑
"


, Discard X cards: Exile the top X cards of target opponent's library. You may play lands and cast spells from among cards exiled this way without paying their mana costs."
You Find Some Prisoners80%
$0.18↓#4434↑0.21↑5.1 years↑
"• Interrogate Them — Exile the top three cards of target opponent's library. Choose one of them. Until the end of your next turn, you may play that card, and you may spend mana as though it were mana of any color to cast it."
Triple Triad80%
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"At the beginning of your upkeep, each player exiles the top card of their library. Until end of turn, you may play the card you own exiled this way and each other card exiled this way with lesser mana value than it without paying their mana costs."
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$0.28↓#16667↓0.46↑5.4 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."
Villainous Wealth79%
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"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."
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"Exile the top three cards of target opponent's library. You may play those cards this turn."
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"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."
Decadent Dragon // Expensive Taste78%
$0.95↓#3260↑0.19↑3.0 years↑
"Exile the top two cards of target opponent's library face down. You may look at and play those cards for as long as they remain exiled."
+1 more matching line
Ixhel, Scion of Atraxa77%
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"At the beginning of your end step, each opponent who has three or more poison counters exiles the top card of their library face down. You may look at and play those cards for as long as they remain exiled, and you may spend mana as though it were mana of any color to cast those spells."