Collecting Leaves

{1}, {t}: Add {g} to your mana pool.

Whenever you would cast your second green spell this turn, Collecting Leaves becomes a 1/1 artifact creature until your next upkeep. It is an Elemental in addition to its other types, and it gains haste and lifelink.

The fallen leaves of Autumn come to life with the swells of brisk winds; or is there something more?