Cheapest priced copy (Conspiracy: Take the Crown): $0.35 at Card Kingdom, near mint, their price list as of .
Spire Phantasm 
Creature — Gargoyle Illusion · 3/2 · Uncommon · Conspiracy: Take the Crown · #37
Reveal this card as you draft it. The next time a player drafts a card from this booster pack, guess that card's name. Then that player reveals the drafted card.
Flying
When this creature enters, if you guessed correctly for a card named Spire Phantasm, draw a card.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Conspiracy: Take the Crown | 37 | Uncommon | $0.35 | $0.49 |
2 rulings from Wizards of the Coast
- 23 August 2016If Spire Phantasm is the last card drafted from a booster pack, no guessing game will be played.
- 23 August 2016Typically, the next player will set aside the card they intend to draft, you'll make your guess, then the card will be revealed. You can make your guess before the player drafts a card to make things weird more interesting.