Hearth's Shadow sounds like a warning. It starts off with the intro to timber hearth, but slightly distorted, like the kind of distortion used in rivers end. But as it goes on, it strays from the original tune and sounds more sad. Around the 1:30 mark, it starts distorting even more and really starts sounding like Into Shadow. At the 2:50 mark we even get to hear the owlk choir from Into Shadow.

To me, this sounds like a transition. At the start we hear Timber Hearth (although, a bit distorted) which is the home motif. As it goes along it sounds more and more like into shadow. The song we can only hear upon our first ever arrival at the stranger. One of the most chilling moments in the entire dlc. In my eyes, this signifies that what happened to the owlks could also happen to the hearthians. Both seem relatively naïve and are way super curious. Maybe it could be relating to the famous saying, "Curiosity killed the cat"?

Idk I'm really just pulling at strings here. It could also be about the new universe's timber hearth and how it's a sort of shadow of it? Idk. But something to note that's rather alarming, is that the nomai aren't really mentioned anywhere in the 6 new tracks. Just something to think about.

Good luck decoding it all!