Snow swampwalk (This creature can't be blocked as long as defending player controls a snow Swamp.)

At the beginning of your upkeep and whenever you cast a white spell, put a charge counter on Shrine of Loyal Legions.

, , Sacrifice Shrine of Loyal Legions: Create a 1/1 colorless Phyrexian Myr artifact creature token for each charge counter on Shrine of Loyal Legions.