The Key to the Vault 
Legendary Artifact — Equipment
$0.37 #2165 0.23 2.4 years
Whenever equipped creature deals combat damage to a player, look at that many cards from the top of your library. You may exile a nonland card from among them. Put the rest on the bottom of your library in a random order. You may cast the exiled card without paying its mana cost.
Equip 
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Duelist's Flame84%
$3.77↑#12872↓0.00↓0.8 years↓
"Until end of turn, target blocked creature you control gets +X/+0 and gains trample and "Whenever this creature deals combat damage to a player, look at that many cards from the top of your library. Exile up to one nonland card from among them and put the rest on the bottom of your library in a random order. You may cast the exiled card without paying its mana cost.""
Kotis, the Fangkeeper78%
$0.36↓#5349↓0.84↑1.4 years
"Whenever this card deals combat damage to a player, exile the top X cards of their library, where X is the amount of damage dealt. You may cast any number of spells with mana value X or less from among them without paying their mana costs."
Swashbuckler's Whip78%
$0.22↓#14298↓0.10↓2.8 years
"Equip "
"
Discover the Impossible77%
$0.19↓#18389↓0.06↓4.5 years↑
"Look at the top five cards of your library. Exile one of them face down and put the rest on the bottom of your library in a random order. You may cast the exiled card without paying its mana cost if it's an instant spell with mana value 2 or less. If you don't, put that card into your hand."
The Infamous Cruelclaw76%
$1.38↑#5153↓0.71↑2.1 years
"Whenever this card deals combat damage to a player, exile cards from the top of your library until you exile a nonland card. You may cast that card by discarding a card rather than paying its mana cost."
Scarlet Witch, Chaotic Avenger74%
$0.35↓#12365↓0.00↓0.2 years↓
"Whenever this card deals combat damage to a player, look at the top two cards of your library, then exile them face down. Then you may cast a Hero or noncreature spell from among cards exiled with this card without paying its mana cost."
Power Fist74%
$14.86↑#17980.43↑2.5 years
"Equip "
"
Ziatora's Envoy73%
$0.21↓#11846↓0.164.4 years↑
"Whenever this creature deals combat damage to a player, look at the top card of your library. You may play a land from the top of your library or cast a spell with mana value less than or equal to the damage dealt from the top of your library without paying its mana cost. If you don't, put that card into your hand."
Collected Conjuring73%
$0.32↓#20215↓0.53↑7.2 years↑
"Exile the top six cards of your library. You may cast up to two sorcery spells with mana value 3 or less from among them without paying their mana costs. Put the exiled cards not cast this way on the bottom of your library in a random order."
Intet, the Dreamer72%
$0.48↑#11329↓0.2419.6 years↑
"Whenever this card deals combat damage to a player, you may pay . If you do, exile the top card of your library face down. You may look at that card for as long as it remains exiled. You may play that card without paying its mana cost for as long as this card remains on the battlefield."
. If you do, exile the top card of your library face down. You may look at that card for as long as it remains exiled. You may play that card without paying its mana cost for as long as this card remains on the battlefield."
Dazzling Sphinx72%
$0.37#6415↓0.53↑5.4 years↑
"Whenever this creature deals combat damage to a player, that player exiles cards from the top of their library until they exile an instant or sorcery card. You may cast that card without paying its mana cost. Then that player puts the exiled cards that weren't cast this way on the bottom of their library in a random order."
Herald of Amity72%
$0.25↓#10956↓0.00↓0.4 years↓
"When this creature enters, exile the top eight cards of your library. You may cast an Aura spell from among them without paying its mana cost. Then put the rest on the bottom of your library in a random order."
Gríma, Saruman's Footman71%
$1.60↑#3164↓0.36↑3.2 years
"Whenever this card deals combat damage to a player, that player exiles cards from the top of their library until they exile an instant or sorcery card. You may cast that card without paying its mana cost. Then that player puts the exiled cards that weren't cast this way on the bottom of their library in a random order."
Keldon Flamesage71%
$0.17↓#18433↓0.13↓4.0 years↑
"Whenever this creature attacks, look at the top X cards of your library, where X is this creature's power. You may exile an instant or sorcery card with mana value X or less from among them. Put the rest on the bottom of your library in a random order. You may cast the exiled card without paying its mana cost."
Glorious Purpose71%
$0.29↓#11511↓0.00↓0.2 years↓
"When the sixth plan counter is put on this enchantment, sacrifice it. If you do, exile the top four cards of your library. You may cast any number of spells from among them without paying their mana costs. Put the rest into your hand."
Sunbird's Invocation71%
$0.25↓#18850.328.9 years↑
"Whenever you cast a spell from your hand, reveal the top X cards of your library, where X is that spell's mana value. You may cast a spell with mana value X or less from among cards revealed this way without paying its mana cost. Put the rest on the bottom of your library in a random order."
Rogue's Gloves71%
$0.30↓#4101↓0.13↓12.1 years↑
"Equip "
"
Aetherworks Marvel70%
$0.30↓#3523↓0.55↑9.9 years↑
"
, Pay six 
: Look at the top six cards of your library. You may cast a spell from among them without paying its mana cost. Put the rest on the bottom of your library in a random order."
, Pay six : Look at the top six cards of your library. You may cast a spell from among them without paying its mana cost. Put the rest on the bottom of your library in a random order."
Bismuth Mindrender70%
$0.36↓#7309↓0.65↑2.2 years
"Whenever this creature deals combat damage to a player, that player exiles cards from the top of their library until they exile a nonland card. You may cast that card by paying life equal to the spell's mana value rather than paying its mana cost."
Svella, Ice Shaper70%
$0.16↓#6962↓0.255.6 years↑
"
, : Look at the top four cards of your library. You may cast a spell from among them without paying its mana cost. Put the rest on the bottom of your library in a random order."
, : Look at the top four cards of your library. You may cast a spell from among them without paying its mana cost. Put the rest on the bottom of your library in a random order."