The Valaraukar, or Balrogs ("Demon of Might"), were demons of fire that served Morgoth, master of Sauron. They were among his most dreadful servants.
In TA 1980, a Balrog awoke in Moria when the Dwarves had mined too deep for mithril. It drove the Dwarves out of their home and slew King Durin VI; the Balrog was thereafter known as "Durin's Bane". This particular Balrog was later slain by Gandalf.
The Balrog is a summonable hero of the upcoming Misty Mountains faction. Information to this page will be added as soon as it is available.