A captivating full body portrait of a dark queen in a mystical, dark fantasy setting, embodying an underworld theme with an artistic deviant art flair. Her piercing crimson eyes and flowing grey hair contrast with her elegant dark dress adorned with intricate dark tattoos. The color grading enhances the otherworldly ambiance, creating a dark illustration with an 8k cinematic effect. Sinister yet alluring, she exudes a powerful presence, enveloped in shadows, with the ethereal glow of her eyes piercing through the darkness, capturing the mysterious allure of an enchanting ruler of the underworld.