FOILCheapest priced copy (Stardates): $3.99 at Card Kingdom, near mint, their price list as of .
Prosper, Tome-Bound 
Legendary Creature — Tiefling Warlock · 1/4 · Mythic · Forgotten Realms Commander · #2
Deathtouch
Mystic Arcanum — At the beginning of your end step, exile the top card of your library. Until the end of your next turn, you may play that card.
Pact Boon — Whenever you play a card from exile, create a Treasure token.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
6 printings · $3.99 to $17.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Forgotten Realms Commander | 2 | Mythic | — | $7.99 |
| Forgotten Realms Commander | 324 | Mythic | $12.99Out of stock | — |
| Forgotten Realms Commander Display Commanders | 2 | Mythic | — | — |
| The List | AFC-2 | Mythic | $7.99 | — |
| Stardates (Spock, Mirror Malefactor) | 24 | Mythic | $3.99 | $9.99Out of stock |
| Secret Lair Drop | 2496 | Mythic | $14.99 | $17.99 |
2 rulings from Wizards of the Coast
- 23 July 2021The Pact Boon ability triggers whenever you play any cards from exile, not just those exiled with the Mystic Arcanum ability.
- 23 July 2021You must still pay all costs and follow all timing rules for cards played with the Mystic Arcanum ability.