Monastery Raid 

Sorcery
Freerunning {X}{R} (You may cast this spell for its freerunning cost if you dealt combat damage to a player this turn with an Assassin or commander.)
Exile the top two cards of your library. If this spell's freerunning cost was paid, exile the top X cards of your library instead. You may play the exiled cards until the end of your next turn.
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Burning Curiosity 99%
$0.20#9535
"Exile the top two cards of your library. If this spell's additional cost was paid, exile the top three cards instead. Until the end of your next turn, you may play those cards."
Crossover Collaboration 97%
$0.35#23680
"Exile the top two cards of your library. Until the end of your next turn, you may play those cards. If this spell was cast using teamwork, create a Treasure token."
Ignite the Future 96%
$0.44#3391
"Exile the top three cards of your library. Until the end of your next turn, you may play those cards. If this spell was cast from a graveyard, you may play cards this way without paying their mana costs."
+1 more matching line
Riverwheel Sweep 95%
$0.14#20488
"Exile the top two cards of your library. Choose one of them. Until the end of your next turn, you may play that card."
Light Up the Stage 95%
$0.28#1211
"Exile the top two cards of your library. Until the end of your next turn, you may play those cards."
+1 more matching line
Wrenn's Resolve 95%
$2.55#2117
"Exile the top two cards of your library. Until the end of your next turn, you may play those cards."
Embrace the Unknown 95%
$1.81#6416
"Exile the top two cards of your library. Until the end of your next turn, you may play those cards."
Reckless Impulse 95%
$1.43#2119
"Exile the top two cards of your library. Until the end of your next turn, you may play those cards."
Chaos Channeler 95%
$0.15#6479
"Exile the top two cards of your library. You may play them this turn."
Rob the Archives 95%
$0.30#8827
"Exile the top two cards of your library. You may play those cards this turn."
Ecstatic Beauty 95%
$0.30#10633
"Exile the top three cards of your library. You may play those cards until end of turn. Put four time counters on each of those cards that has suspend."
Questing Druid // Seek the Beast 95%
$0.40#8285
"Exile the top two cards of your library. Until your next end step, you may play those cards."
The Legend of Roku // Avatar Roku 93%
$10.50#4422
"Exile the top three cards of your library. Until the end of your next turn, you may play those cards."
Inspired Tinkering 93%
$1.33#2795
"Exile the top three cards of your library. Until the end of your next turn, you may play those cards."
Act on Impulse 92%
$0.30#15424
"Exile the top three cards of your library. Until end of turn, you may play those cards."
Glimpse the Impossible 89%
$0.29#2155
"Exile the top three cards of your library. You may play those cards this turn. At the beginning of the next end step, if any of those cards remain exiled, put them into your graveyard, then create a 0/1 colorless Eldrazi Spawn creature token for each card put into your graveyard this way. Those tokens have "Sacrifice this token: Add {C}.""
Apex of Power 85%
$1.04#4002
"Exile the top seven cards of your library. Until end of turn, you may cast spells from among them."
Aminatou's Augury 85%
$0.36#2541
"Exile the top eight cards of your library. You may put a land card from among them onto the battlefield. Until end of turn, for each nonland card type, you may cast a spell of that type from among the exiled cards without paying its mana cost."