Cheapest priced copy (Eighth Edition): $0.35 at Card Kingdom, near mint, their price list as of .
Spreading Algae 
Enchantment — Aura · Uncommon · Urza's Saga · #274
Enchant Swamp
When enchanted land becomes tapped, destroy it.
When this Aura is put into a graveyard from the battlefield, return it to its owner's hand.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
3 printings · $0.35 to $4.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Eighth Edition | 281 | Uncommon | $0.35 | — |
| Eighth Edition | 281★ | Uncommon | — | $4.49 |
| Urza's Saga | 274 | Uncommon | $0.49 | — |
One ruling from Wizards of the Coast
- 1 April 2008This card now has Enchant Swamp, which works exactly like any other Enchant ability. This means it can only be cast targeting a Swamp, and it will be put into its owner's graveyard if the permanent it's attached to ever stops being a Swamp.