|Other names||Durin's Bane, Nameless Terror, Flame of Udûn, Shadow and Flame|
|Title||Lord of Balrogs, Lord of Moria|
|Date of birth||After the creation of Arda|
|Year ascended to the throne||1980 3A|
|Date of death||November 10, 3001 3A|
|Weaponry||Fiery whip, flaming sword|
|Hair color||Mane of red flames|
|Siblings||Kosomot, Lungorthin, Malrog, Osombauko|
|Lord of the Rings film trilogy|
Malraugin was one of the Balrogs created by Morgoth. He served in the Valaraukar, an order of Balrogs in Morgoth's service. He was also one of those that fought in many battles of the War of the Jewels, up to and including the War of Wrath. He somehow managed to survive Morgoth's defeat, fleeing east and taking refuge beneath the Misty Mountains.
For more than five thousand years, Malraugin lay dormant at the roots of the mountains in Khazad-dûm. It remained undisturbed throughout the Second Age and most of the Third Age, until the miners of Dwarf-King Durin VI awoke it when they mined too deeply and too greedily in their search for mithril. Malraugin slew Durin, and was thereafter known as Durin's Bane. The Dwarves attempted to fight Malraugin, but its power was far too great. Despite their efforts to hold Khazad-dûm against it, King Náin and many of the Dwarves were killed, and the survivors were forced to flee.
News of the disaster reached the Silvan elves of Lothlórien, who called Malraugin the Nameless Terror (not knowing its true nature at the time), and who began to refer to Khazad-dûm as Moria (dark abyss).