Goblin Snowblazers

Haste
Flash (You may cast this spell anytime.)
Snowfall — When Goblin Snowblazers enters
the battlefield, if you control at least three snow
permanents, you may mill 3. If you do, you may
return target snow-covered land from your
graveyard to the battlefield tapped. (To mill 3, a
player puts the top 3 cards of their library into
their graveyard.)