The term 'Servant of Sauron' refers to an Orc, a fictional race of humanoid creatures from J.R.R. Tolkien's Middle-earth fantasy universe. Orcs are typically portrayed as being cruel and savage, and they often serve as the minions of the Dark Lord Sauron. In Tolkien's works, Orcs are described as being fierce warriors and loyal servants of Sauron, and they are often used to carry out his orders.