Garm ran through the air and mist behind them, he used his scent to find Skuld and he sensed that she was in the tree and more specifically in one of the roots.
Amidst icy Niflheim he was sovereign and mighty, his steps made the earth tremble.
It wasn't difficult to find the roots, they were everywhere, the biggest obstacle in that endeavor was to avoid having problems with the great dragon Nidhogg.
Nidhogg bites and gnaws at the roots of Yggdrasil, waiting for the trumpet to finally sound, announcing the arrival of Ragnarok.
The dragon was huge and much bigger than Garm himself and with his long body he curled up among the roots, he and Garm definitely didn't get along.
Garm approached the roots he believed to be where Skuld was and Nidhogg was quiet just resting and sleeping so just ignore him and continue with your quest.
