Pretty cool card. It needs to say "~ gets +1/+1 for each land type among lands you control." Decently fair at 4 mana, though I could argue for 3. I mean, they made Matca Rioters a common. This isn't much better unless you have a really strange deck.
I had a domain Deck for the longest time and I was running it wrong and it's were you missing the wording right now. when i was running Matca Rioters with Snow lands hoping to boost it to 10/10 potential. but i looked at the Domain Ruling and it specifically says
To determine the number of basic land types among lands you control, look at the lands you have on the battlefield and ask yourself whether the subtypes Plains, Island, Swamp, Mountain, and Forest appear within that group. The number of times you say yes (topping out at five) tells you how powerful your domain abilities will be.
so matca Rioters can only become a 5/5 at max. this card on the other hand does not have Domain, and says "each land type among lands you control."
Lands always confuse me though, does this mean this card can get an additional +5/+5 for having all of the snow lands or does it only get +1/+1 even if you have all 5 different snow colors?
http://fc07.devianta...ayAutumnKay.jpg
keep in mind the typing, it's:
"Basic Snow Land --- Mountain"
basic is the super type, Snow land is the type, and Mountain is the sub type.