Mystici

Trained on dark fantasy elf and monster imagery, illustrative style, but works for regular portraits, landscapes, themes. Expect a rougher line and darker tone.

You may easily use "ligne claire," "illustration," "comic art," "vintage comic," and "line art" to get those effects (but you can get a more painterly effect with other prompts). I also recommend descriptors like "rough strokes," "gritty," "gangly" and "dark."