SDXL, this time with prodigy
A lot of images of grotesques, drolleries, marginalia and doodles from illuminated manuscripts went inside, there were some magic and poof: you have this LoRA.
See the notes for how to use it, as it alone isn't enough: you need a stylized 2d style as a base, or else you will not really obtain medieval doodles. I tried the style LoRA of tehalex86 and I found the PEN REALISM version works wonders (read its instructions too).