This morning I had a powerful encounter with an ice dragon. Ice will stop the flow, yes, but only on the surface. It reflects everything. It allows you to cross that river or maybe even (part of) the sea with ease. You may slip if you're not careful, so don't get too comfortable in the realization that all you have to do is walk. And as soon as you let the warmth and light of the sun back in, it melts away. But it will return during what seems like the coldest and darkest days. So call on that when you feel the need.