Spreading Algae
Eighth Edition — uncommon
Enchantment — Aura
Spreading Algae rulings:
2008-04-01: This 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.