Walking slowly, Bly is able to move at half speed up the icy ice stairs, getting a full 15 feet up the 200 foot high staircase in one round.

Walking up the Icy Ice Stairs
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A successful Acrobatics check allows a character to move at half their movement rate without slipping and falling. For a movement rate of 30 feet, that is 15 feet. As the staircase is 200 feet, that will be a total of 14 times.



Garrick
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Even as you can see in the darkness, there is not much to see. The room looks empty other then the icy ice staircase, the dozen or so floating lights, and the bare wooden walls on the room. In fact the walls of the room are the rough sides like a living tree trunk.