Cheapest priced copy (The Brothers' War Retro Artifacts): $0.35 at Card Kingdom, near mint, their price list as of .
Elsewhere Flask 
Artifact · Common · Shadowmoor · #250
When this artifact enters, draw a card.
Sacrifice this artifact: Choose a basic land type. Each land you control becomes that type until end of turn.
Legal inCommanderModernLegacyVintagePauper
Not legal inBrawlStandardPioneer
4 printings · $0.35 to $0.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| The Brothers' War Retro Artifacts | 15 | Uncommon | $0.35 | $0.49 |
| The Brothers' War Retro Artifacts | 78 | Uncommon | $0.35 | $0.49 |
| The Brothers' War Retro Artifacts | 78z | Uncommon | — | — |
| Shadowmoor | 250 | Common | $0.59 | $0.99Out of stock |
3 rulings from Wizards of the Coast
- 1 May 2008Changing a land's type doesn't change its name or whether it's legendary or basic.
- 1 May 2008Lands you control will have the mana ability of the basic land type you choose (for example, Forests can tap to produce green mana) and will lose all other innate abilities they had.
- 1 May 2008All your lands will have the chosen land type and no other land type.