Triple Triad {3}{R}{R}{R}
Enchantment
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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Cards that do something similar expected a card that isn't here?
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Timesifter 97%
$2.56#13249
"At the beginning of each upkeep, each player exiles the top card of their library. The player who exiled the card with the greatest mana value takes an extra turn after this one. If two or more players' cards are tied for greatest, the tied players repeat this process until the tie is broken."
Uvilda, Dean of Perfection // Nassari, Dean of Expression 85%
$0.25#16260
"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."
Stolen Strategy 85%
$0.36#4419
"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."
Monk Class 83%
$0.39#9613
"At the beginning of your upkeep, exile the top card of your library. For as long as it remains exiled, it has "You may cast this card from exile as long as you've cast another spell this turn.""
Vance's Blasting Cannons // Spitfire Bastion 82%
$0.32#14469
"At the beginning of your upkeep, exile the top card of your library. If it's a nonland card, you may cast that card this turn."
Count on Luck 82%
$0.51#4430
"At the beginning of your upkeep, exile the top card of your library. You may play that card this turn."
Visions of Phyrexia 82%
$0.43#8536
"At the beginning of your upkeep, exile the top card of your library. You may play that card this turn."
Bell Borca, Spectral Sergeant 82%
$0.18#16433
"At the beginning of your upkeep, exile the top card of your library. You may play that card this turn."
Charred Foyer // Warped Space 81%
$2.62#2821
"At the beginning of your upkeep, exile the top card of your library. You may play it this turn."
Urabrask, Heretic Praetor 81%
$1.56#4319
"At the beginning of your upkeep, exile the top card of your library. You may play it this turn."
Plargg and Nassari 81%
$0.34#2297
"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."