Midwives of Discord has this song called "Dunewalker", which involves this gargantuan being.
The size of the ancient demon is unfathomable, and what I'm depicting here is merely a teeny tiny part of the whole horror that is the Dunewalker.
If ya didn't know, I'm a big fan of the Midwives and am loving the concept of this creature.
This isn't necessary "canon" to how they imagine the Dunewalker, it's just me doing some silly fanart.
Personal note: the mountains look kinda cool
EDIT: Totally check out the song over here [link]