Quirion Rover

When Quirion Rover enters the battlefield, it
Explores. Then you choose a color.
{t}: Add {g}.Green.
{t}: Add one mana of the chosen color.
Scouts sworn to wander the world a century, they are
the Coalitions secret scouts. There is no land that has
not felt the ramp of their boots. No place to marshal
forces they will not find.