Create a detailed pencil drawing collage of the following fighters from Game of Thrones. The collage should include the following characters, each depicted only once and in their iconic attire: Jon Snow, Arya Stark, Jaime Lannister, Sandor Clegane (The Hound), Gregor Clegane (The Mountain), Brienne of Tarth, Khal Drogo, Oberyn Martell (The Red Viper), Tormund Giantsbane, and Daario Naharis. Each character should be in a dynamic pose that captures their unique fighting style. The overall style should be realistic and detailed, with a cohesive composition that highlights the strength and individuality of each character. Ensure that only the specified characters are included and there are no duplicates.