Cheapest priced copy (Exodus): $0.35 at Card Kingdom, near mint, their price list as of .
Flowstone Flood 
Sorcery · Uncommon · Exodus · #83
Buyback—Pay 3 life, Discard a card at random. (You may pay 3 life and discard a card at random in addition to any other costs as you cast this spell. If you do, put this card into your hand as it resolves.)
Destroy target land.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
2 printings · $0.35 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Exodus | 83 | Uncommon | $0.35 | — |
| World Championship Decks 1999 | mlp83sb | Uncommon | $0.35 | — |
One ruling from Wizards of the Coast
- 4 October 2004You can’t pay the Buyback cost unless you have at least one card in your hand to discard.