Question

[leader of mortals]

What?? the only way to get to the west side of Silverflow's end is to go through the frozen brook.

The route you need is

Freezing Gorge -> Head of the Silverflow -> Icebound Flow -> Karydine Glacier -> Silverflow's End

This should be correct, but I wonder why it doesn't say anything about this in the strategy guide. I had to ask this question too...