Beyond The Wall

{t}: Add {s}{s}{s} to your mana pool and create a 2/1 wildling snow creature token. Activate this ability
only if you control 4 or more snow permanents.
At the beginning of your upkeep target land
becomes a snow land in addition to its other types.
"North of the Wall, things are different. That's
where the children went, and the giants, and the other
old races."
—Osha