Cheapest priced copy (Prophecy): $0.35 at Card Kingdom, near mint, their price list as of .
Rhystic Shield 
Instant · Common · Prophecy · #20
Creatures you control get +0/+1 until end of turn. They get an additional +0/+2 until end of turn unless any player pays {2}.
Legal inCommanderLegacyVintagePauper
Not legal inBrawlStandardPioneerModern
1 printing · $0.35 to $0.79 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Prophecy | 20 | Common | $0.35 | $0.79Out of stock |
2 rulings from Wizards of the Coast
- 4 October 2004Each player (starting with the current player and going in turn order) gets the option to pay when this spell resolves.
- 4 October 2004Only affects creatures you control when it resolves.