Skull Samurai, ancient haunted battlefield, standing menacingly with sword drawn, ghostly warrior risen from the dead, foggy moonlit battlefield with ancient ruins, soft eerie moonlight casting long shadows, inspired by Takashi Okazaki and H.R. Giger, dark fantasy realism, digital painting, full-body action pose, muted grays and blacks with highlights of red, high-definition hyper-detailed texture rendering, 8K resolution, photorealistic, impeccable detailing