Lone Aurochs

When Lone Aurochs enters the battlefield, bury target land in snow. (To bury a land in snow, put a snow counter on it. That land becomes a snow land in addition to its other types.)
Flurry - Whenever Lone Aurochs attacks, if the defending player controls a snow land, it gets +1/+0 for each snow land the defending player controls and you gain 2 life.