Tundra Ruins

This land enters the battlefield tapped.
{t}, add {s} to your mana pool.
{t}, add {c} to your mana pool.
{t}, Sacrifice Tundra Ruins: Search your library
for a Snow permanent with mana cost X, where
X is the number of Snow permanents you
control. Reveal this card and put it in your hand,
shuffle your library afterwards.