Cheapest priced copy (Commander 2014): $0.49 at Card Kingdom, near mint, their price list as of .
Sphinx of Uthuun 
Creature — Sphinx · 5/6 · Rare · Magic 2013 · #69
Flying
When this creature enters, reveal the top five cards of your library. An opponent separates those cards into two piles. Put one pile into your hand and the other into your graveyard.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
8 printings · $0.49 to $1.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander 2014 | 128 | Rare | $0.49 | — |
| Commander 2018 | 104 | Rare | $0.49 | — |
| Commander Legends | 406 | Rare | $0.49 | — |
| Duel Decks: Venser vs. Koth | 22 | Rare | $0.49 | — |
| Duel Decks: Speed vs. Cunning | 59 | Rare | $0.49 | — |
| Iconic Masters | 74 | Rare | $0.49 | $0.79 |
| Magic 2012 | 76 | Rare | $0.59 | $0.99 |
| Magic 2013 | 69 | Rare | $0.49 | $1.49Out of stock |
3 rulings from Wizards of the Coast
- 17 November 2017A pile can have no cards in it. In this case, you'll choose whether to put all the revealed cards into your hand or into your graveyard.
- 17 November 2017You (not your opponent) choose which pile to put into your hand and which to put into your graveyard.
- 17 November 2017In multiplayer games, you choose an opponent to separate the cards when the ability resolves. This doesn't target that opponent. Because the cards are revealed, all players may see the cards and offer opinions.