Based on my own ai styles, v11 and v16 from Anima

https://civarchive.com/models/2678407/buns-mj-styles-for-anima-21-styles?modelVersionId=3025256
https://civarchive.com/models/2678407/buns-mj-styles-for-anima-21-styles?modelVersionId=3035418

Pairs very well with my dark fantasy lora
https://civarchive.com/models/516932/dark-fantasy?modelVersionId=3340191

Tags you can use

darkgrimoil style, digital painting of [subject]
darkgrimoil style, digital painting, impressionistic style of [subject]
darkgrimoil style, digital painting, impressionistic style of dark [subject]

Generally, anything dark-related, will go towards the v11, otherwise it's pretty fair for what it is.