See the World

Whenever a basic land enters the battlefield
under your control, if it doesn't share a basic
land type with any other land you control, add
two mana of any one color that land could
produce. This mana doesn't empty from your
mana pool as steps, phases, and turns end.
{w}{u}{b}{r}{g}: Put a permanent card from your
hand onto the battlefield. Activate this ability
only if you control a basic land of each basic land
type.