Let me preface by saying that Valheim is by far one of the most screenshottable games I have played.
A big part of Valheim is exploration and the lighting in this game is stunning. I like the sense of danger that this screen shot exudes: a lone viking walking through a thick forest, seemingly alert for any enemies lurking behind the next tree.
Highest boss I killed (once) was Yagluth, too.. But later patches to the mountains looked promising, and now there's more gear and some (one?) more mob(s) in the dark forest - fun thing to run into unexpectedly :)