Cheapest priced copy (Commander 2011): $0.79 at Card Kingdom, near mint, their price list as of .
False Prophet 
Creature — Human Cleric · 2/2 · Rare · Commander 2011 · #13
When this creature dies, exile all creatures.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
3 printings · $0.79 to $34.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander 2011 | 13 | Rare | $0.79 | — |
| Urza's Destiny Promos | 6 | Rare | — | $8.99 |
| Urza's Destiny | 6 | Rare | $1.29 | $34.99 |
One ruling from Wizards of the Coast
- 4 October 2004False Prophet only exiles creatures, which means only creature permanents which are on the battlefield. It won’t exile itself since it is already in the graveyard.