Cheapest priced copy (Prophecy): $0.35 at Card Kingdom, near mint, their price list as of .
Rhystic Lightning 
Instant · Common · Prophecy · #99
Rhystic Lightning deals 4 damage to any target unless that permanent's controller or that player pays {2}. If they do, Rhystic Lightning deals 2 damage to the permanent or player.
Legal inCommanderLegacyVintagePauper
Not legal inBrawlStandardPioneerModern
1 printing · $0.35 to $2.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Prophecy | 99 | Common | $0.35 | $2.49 |
One ruling from Wizards of the Coast
- 4 October 2004The player gets the option to pay when this spell resolves.