Chainsaw dagger! Woo!! *Ahem* Anyway...
The thought occurs to you to change Fortresssparks into a more grippy form. You inch your way to the windward edge of the bridge and grab hold to keep from flying off. You then have Fortresssparks take it's normal shape. It happily complies.
Now prepared to get to work, you focus on what you want Fortresssparks to look like. You try out a serrated-blade dagger, stabbing it into the concrete. You try to pull yourself along with it, but it just moves through the ice and stone with very little resistance. Hm. Wait! An idea! You stab Fortresssparks into the bridge diagonally and pull. Ha! Take That, nature!
Nature, unamused, decides to take action, though you would have no knowledge of this.
After some time, you make it across the bridge. You take an appreciative look at Fortresssparks, and notice that the serrated teeth seem to be moving. Then it hits you: Chainsaw Dagger! Of course! How could you have been so blind? Smiling, you go walk against the wind along the path. It begins to snow.
After you march along for a while, you notice that you're really thirsty. You drink down the remainder of the water in your waterskin. Should I get more water? Yes, I should, but where? You ponder your options. The snow isn't thick enough on the ground yet to grab some and eat it.
As you ponder, the goblins in your mind keep watch. You wouldn't have noticed it, but they yell at you in your mind to look for the source of the the growling.
Wait, Growling!? You spin around just in time to dodge a leaping wolf. Fight? Flee?