The Balrogs are creatures of Arda, a fictional fantasy universe created by the writer J.R.R. Tolkien. They are Maiar seduced by Morgoth, The Evil Principle, the first Dark Lord of Middle-Earth. Such as Sauron, they were the most powerful servants of Middle-Earth. In Sindarin, Balrog means literally “demon of might”, while in Quenya they are called Valaraukar, with the same meaning. They appeared in “Lord of the Rings”.