Trained on 250 pngs of black souls 2
While it does not have a trigger word, adding 'hatching \(texture\), horror \(theme\)' can help get that signature feel. I would also recommend tossing '3d, realistic' into the negative prompt as well.
It should be noted that I liked my imgs with a bit more detail, so I used FeMix_HassakuXL. If you want something more true to the style, use something like Garage Mix Illustrious.