The Crown Tundra

The Crown Tundra enters the battlefield tapped.
{t}: Add {c}. If this mana was spent to cast a snow creature spell, that creature enters the battlefield
with an additional +1/+1 counter on it.
{w}{u}{b}{r}{g}, {t}: Until the end of turn, snow
lands you control tap for an additional mana of
the color they could produce.