Cheapest priced copy (Edge of Eternities): $0.49 at Card Kingdom, near mint, their price list as of .
Memorial Vault 
Artifact · Rare · Edge of Eternities · #336
{T}, Sacrifice another artifact: Exile the top X cards of your library, where X is one plus the mana value of the sacrificed artifact. You may play those cards this turn.
Legal inCommanderBrawlStandardPioneerModernLegacyVintage
Not legal inPauper
4 printings · $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Edge of Eternities | 145 | Rare | $0.49 | $0.49 |
| Edge of Eternities | 336 | Rare | $0.49 | $0.49 |
| Edge of Eternities Promos | 145p | Rare | $0.49 | $0.49 |
| Edge of Eternities Promos | 145s | Rare | — | $0.49 |
2 rulings from Wizards of the Coast
- 25 July 2025If an artifact has {X} in its mana cost, X is 0 for the purpose of determining its mana value.
- 25 July 2025You pay all costs and follow all timing rules for cards played with the permission granted by Memorial Vault’s ability. For example, if an exiled card is a land card, you may play it only during your main phase while the stack is empty.