At first glance, this is a pretty simple task, to depict a tree that no one has seen anywhere before. But as soon as you remember that any fantasy always based on what has already been seen before, you will understand that this task is very hard, especially for my favorite neural network (R). However, it somehow copes with this task too.
Sources
I generate images on Dreamlike
Artificial Intelligence Art Universe Group
Midjourney Official Facebook Group