Crystalscape Harvest

{t}: Add {g/u} to your mana pool.
{u}{u}, {t}: Create a Blue token artifact named Crystal with "Sacrifice this token, Scry 1".
{g}{g}, {t}: Create a 1/1 Green Sprig creature token.
{u}{g}, Sacrifice Crystalscape Harvest: Scry 1. If the card is Green, you may cast it without paying its mana cost.