the "abstract prompt" (image to prompt) works ok with this. Using Canny (ControlNet) can help a lot with transforming a real image into Dark Fantasy (I recommend Canny: 0.4 and ControlStep: 0-0.8).
Prompt:
If you are having problems with pics coming out weird:
change the prompt in that specific part - make the prompt more clear
(Ex: instead of "his fingers wrapping around the sword" use "he holds the sword")
don't use one super large sentences to describe one thing - break it into pieces
(Ex: instead of "a beautiful woman with red long hair wears a green old cape and sits in a medieval castle" use "a beautiful woman with red long hair, wearing a green cape, sitting in a medieval castle")
don't break the flow of the prompt - write it like a sequence
(Ex: instead of "a beautiful woman, wearing a green cape, sitting in a medieval castle, with red long hair" use "a beautiful woman with red long hair, wearing a green cape, sitting in a medieval castle")