Cheapest priced copy (Forgotten Realms Commander): $0.49 at Card Kingdom, near mint, their price list as of .
Prognostic Sphinx 
Creature — Sphinx · 3/5 · Rare · Archenemy: Nicol Bolas · #26
Flying
Discard a card: This creature gains hexproof until end of turn. Tap it.
Whenever this creature attacks, scry 3.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
5 printings · $0.49 to $1.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Forgotten Realms Commander | 90 | Rare | $0.49 | — |
| Magic 2015 Clash Pack | 1 | Rare | — | $1.29 |
| Duskmourn: House of Horror Commander | 124 | Rare | $0.49 | — |
| Archenemy: Nicol Bolas | 26 | Rare | $0.49 | — |
| Theros | 60 | Rare | $0.69 | $1.49Out of stock |
5 rulings from Wizards of the Coast
- 15 September 2013When you scry, you may put all the cards you look at back on top of your library, you may put all of those cards on the bottom of your library, or you may put some of those cards on top and the rest of them on the bottom.
- 15 September 2013Scry appears on some spells and abilities with one or more targets. If all of the spell or ability's targets are illegal when it tries to resolve, it won't resolve and none of its effects will happen. You won't scry.
- 15 September 2013You perform the actions stated on a card in sequence. For some spells and abilities, that means you'll scry last. For others, that means you'll scry and then perform other actions.
- 15 September 2013You can activate Prognostic Sphinx's ability even if it's already tapped.
- 15 September 2013You choose how to order cards returned to your library after scrying no matter where you put them.