Polar Tundra

If its neither day nor night when you play Polar Tundra, it becomes day as Polar Tundra enters
the battlefield. Polar Tundra enters the battlefield tapped. When you play Polar Tundra, shuffle
two cards from your hand into your library. If it
is night, Polar Tundra is a Snow Land.
{t}: Add {g}{c}. Use this ability only if it is day.
{t}: Add {u}{c}. Use this ability only if it is night.