a tribal death shaman crouched inside a rocky cave, wearing a weathered skull mask with cracked bone texture and black eye sockets, pale ash-painted skin covered in ritual markings, holding a wooden spear, primitive necklaces and torn fur wrappings, cinematic dark fantasy atmosphere, dramatic cave lighting, monochrome graphite and charcoal illustration style with subtle sepia and bone-white colored pencil accents, rough hand-drawn pencil strokes, layered crosshatching, dusty sketchbook texture, gritty traditional drawing aesthetic, selective muted earthy tones, highly detailed organic textures, raw savage fantasy mood