Prismaria

Prismaria enters the battlefield tapped.
As long as Prismaria is in play, all lands in play
and all lands not in play have the land type
"basic land" and lose all other land types.
{t}: Add one mana of any color.
"Everything in Prismaria is light, simple and easy to
understand. It is, as if the natural environment is
caring for the well being of it's inhabitants."