Reap the Rimewind

Add two mana of any one color.
If {s} was used to cast this spell, Draw a card.
Rainbow: Until end of turn, lands you control
gain the Snow type and "{t}: Add one mana
of any color."(As long as one mono-color permanent
of each color is in play, the game has rainbow.)
"The witch must have the power of the ancient gale.
Summer was banished in a blizzard of snow."