Snowy Days

Fading X, Snowy Days enters the battlefield
with an additional fade counter for each {s} spent
to cast it.(This card enters the battlefield with X fade
counters on it. At the beginning of your upkeep, remove
a fade counter from it. If you can't, sacrifice it.)
All lands are snow. (Mana they produce are {s} in addition to their color.)
Snow creatures get +0/+2.
Damage that would be dealt by snow creatures
can't be prevented.