Cheapest priced copy (Ultimate Masters): $1.29 at Card Kingdom, near mint, their price list as of .
Spoils of the Vault 
Instant · Rare · Mirrodin · #78
Choose a card name. Reveal cards from the top of your library until you reveal a card with that name, then put that card into your hand. Exile all other cards revealed this way, and you lose 1 life for each of the exiled cards.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
2 printings · $1.29 to $27.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Mirrodin | 78 | Rare | $1.79 | $27.99 |
| Ultimate Masters | 116 | Rare | $1.29 | $2.99 |
One ruling from Wizards of the Coast
- 7 December 2018You don’t have to choose the name of a card that’s still in your library, or even a card that’s in your deck at all. If no card with the chosen name is in your library, you exile your library and lose 1 life for each of those cards.