The Key to the Vault
Legendary Artifact — Equipment
POTJOutlaws of Thunder Junction Promos#54srare
- Promo
- Prerelease
- Finishes
- Foil
- Border
- black
- Security stamp
- oval
- Frame
- 2015
- Pull rate
- ~1 in 70
- Illustrator
- Leon Tukker
- Found in
- Outlaws of Thunder Junction Prerelease Pack
CommanderLegalModernLegalStandardLegal
Format legality
Constructed
StandardLegal
PioneerLegal
ModernLegal
LegacyLegal
VintageLegal
PauperNot legal
Commander
CommanderLegal
Pauper CommanderNot legal
Duel CommanderLegal
PreDHNot legal
OathbreakerLegal
Tiny LeadersLegal
Arena
AlchemyNot legal
HistoricLegal
TimelessLegal
BrawlLegal
Standard BrawlLegal
Competitive BrawlLegal
GladiatorLegal
Other
PremodernNot legal
Old SchoolNot legal
Penny DreadfulLegal
Future StandardLegal
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 
Equip
Plays as:
Combat Damage TriggerIs Equipment
Market · per finishspark updated 3h ago · prices as of 2026-08-30
TCGplayerFinish
Market
Δ 30D · Trend
Low
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Buy / Sell Gap
Buy
Foil
$1.01
+3.1%
Since Apr 2024:H $3.49L $0.59$0.91
$0.72
$0.19+21% · normal spread
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Rulings
3 · latest Apr 12, 2024
- WotCApr 12, 2024
If the spell you cast has
in its mana cost, you must choose 0 as the value of X when casting it without paying its mana cost. - WotCApr 12, 2024
If you cast a spell “without paying its mana cost,” you can’t choose to cast it for any alternative costs. You can, however, pay additional costs, such as kicker costs. If the spell has any mandatory additional costs, those must be paid to cast the spell.
- WotCApr 12, 2024
You choose whether to cast the exiled card as The Key to the Vault’s triggered ability resolves. If you do, you do so as part of the resolution of that ability. You can’t wait to cast it later in the turn. Timing restrictions based on the card’s types are ignored.