Talia, Botanist in Training

Intern (Talia, Botanist in Training can be your commander in addition to your other commander(s))
Eminence - As long as Talia, Botanist in Training is in the command zone or on the battlefield, the first land you play per turn enters the battlefield tapped.
Reach
{2}{g}{g} Exile Talia, Botanist in Training: until end of turn, whenever you tap a land for mana, add one mana of any color to your mana pool.