Topaz Solar Farm

{t}, {e}{e}: Add {w}{w} to your mana pool.
{t}, {w}{w}: Add {e}{e} to your energy pool.
{t}, {2}{w}, {e}{e}{e}{e}: Put an artifact token named Solar Panel with "{t}: Add {w} to your mana pool." onto the battlefield.
{t}, {3}{w}{w}, {e}{e}{e}{e}{e}{e}, Sacrifice 4 Solar Panel tokens: You get an emblem with "Whenever you tap a land for {w}, add another {w} to your mana pool."