Text (PC): Each land is a Swamp in addition to its other land types.
While in play, this card is a Swamp, and just like all Swamps it has the "{Tap}: Add {B} to your mana pool." ability. [Planar Chaos FAQ 2006/12/13]
If this card loses its abilities, all lands will still be Swamps. This is because of how continuouse effects work. The type-changing ability is applied before this card loses its abilities. [Planar Chaos FAQ 2006/12/13]
