Cheapest priced copy (Final Fantasy): $6.49 at Card Kingdom, near mint, their price list as of .
Dark Confidant 
Creature — Human Wizard · 2/1 · Mythic · Double Masters · #342
At the beginning of your upkeep, reveal the top card of your library and put that card into your hand. You lose life equal to its mana value.
Legal inCommanderBrawlStandardPioneerModernLegacyVintage
Not legal inPauper
14 printings · $6.49 to $89.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Double Masters | 81 | Mythic | $7.49 | $12.99 |
| Double Masters | 342 | Mythic | $10.99 | $9.99 |
| Final Fantasy | 94 | Mythic | $6.49 | $6.99 |
| Final Fantasy | 334 | Mythic | $10.99 | $15.99 |
| Judge Gift Cards 2011 | 6 | Rare | — | $89.99Out of stock |
| Foundations Jumpstart | 114 | Mythic | $6.99 | — |
| Modern Masters 2015 | 75 | Mythic | $7.99 | $9.99Out of stock |
| Modern Masters | 75 | Mythic | $9.99 | $37.99 |
| Final Fantasy Promos | 94s | Mythic | — | $37.99 |
| Ravnica: City of Guilds | 81 | Rare | $16.99 | $59.99 |
| Ravnica Remastered | 71 | Mythic | $6.49 | $7.99 |
| Ravnica Remastered | 323 | Mythic | $7.49 | $11.99 |
| Ravnica Remastered | 323z | Mythic | — | — |
| Store Championships | 3 | Rare | — | $89.99 |
2 rulings from Wizards of the Coast
- 7 August 2020If a card in a player's library has {X} in its mana cost, X is considered to be 0.
- 6 June 2025If a card in a player's library has {X} in its mana cost, X is 0 for the purpose of determining its mana value.