Wow, this is stunning! I love Kasiopea's Maeglin artwork as well so I instantly connected this with that series, but it is definitely it's own thing too. I love that you decided to use purples in Nan Elmoth, I've only ever really seen blues, this makes it look a lot more organic and vibrant and alive, like the mouth of a creature or something. Wonderful work.
I love your technique here! The trees are so distinct and detailed, but their loopy characteristics make it seem like the two characters are walking through a dark vortext. Nicely done!