Portrait of a Tall Man, beard made, with white and spiky hair

Portrait of a Tall Man, beard made, with white and spiky hair, with silver iris of the eyes, inside a medieval castle, with a reddish full moon with its glow coming through a window, wearing a black medieval Brunea with a round black sun on the chest, with a large circular shield adorned with a black sun and emanating a magical aura, using a long sword, relaxed pose, realistic, intricate details, with heavy rain with thunder outside the castle.