Saruman's Snows is part of the powerful Weather spell set from Fellowship block. It's ability to be played on a site give you as the Shadow player two different strategies to potentially use: first, to be played on the current site, or else, playing it on the Fellowship's next site to force a stop.

With the first option, this card will all but guarantee a successful skirmish run for you, as Uruk-hai are normally a high enough strength to win skirmishes outright without pumps. Remember that Archery special abilities can still whittle down your army to insignificance, cards such as Armor and Gimli's Helm will still limit your damage+1 modifiers, and Response abilities such as Intimidate can still prevent deaths. It is best to either pack four copies of this card and drop it every chance you get and thus slowly beat down your opponent over several ability-less skirmishes, or save a single copy for just the right drop when brute force will suffice.

The second maneuver is less usable but can still be a viable tactic. By placing the spell on the site ahead on the adventure path, you can force your opponent to seriously consider whether or not he can survive without using abilities. This can be used as a bluff but is of course improved by having even a single minion on the table.

• Any skirmish-heavy fellowship tactics

• Targeted (or regular) Archery
• Condition removal (especially Boromir's Cloak and Make Light of Burdens)

• Decklists or links to decks that use this card.

This card is on the Expanded X-List, meaning it can not be used in any deck in that format.

From the Current Rulings Document - March 2004:

Spell. Weather. To play, exert a minion. Plays on a site. No player may play skirmish events or use skirmish special abilities during skirmishes at this site. Discard this condition at the end of the turn.