Cheapest priced copy (Duel Decks: Blessed vs. Cursed): $0.35 at Card Kingdom, near mint, their price list as of .
Tower Geist 
Creature — Spirit · 2/2 · Uncommon · Duel Decks: Blessed vs. Cursed · #30
Flying
When this creature enters, look at the top two cards of your library. Put one of them into your hand and the other into your graveyard.
Legal inCommanderPioneerModernLegacyVintagePauper
Not legal inBrawlStandard
4 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Duel Decks: Blessed vs. Cursed | 30 | Uncommon | $0.35 | — |
| Dark Ascension | 53 | Uncommon | $0.35 | $0.49 |
| Innistrad Remastered | 93 | Common | $0.35 | $0.49 |
| Magic Origins | 80 | Uncommon | $0.35 | $0.49 |
One ruling from Wizards of the Coast
- 22 January 2011If there's only one card in your library when Tower Geist enters, you'll look at that card and put it into your hand.