Shaman of Fire and Forest

{t}: Add {r}{r}, {r}{g} or {g}{g} to your mana pool
If at least three red mana was spent to cast this
spell, Shaman of Fire and Forest deals 2 damage
to all creatures your opponents control.
If at least three green mana was spent to cast this
spell, return target Artifact or Land card from
your graveyard to your hand.