Named Durin’s Bane because of its slaying of the great Dwarven king, this Balrog is one of the last of its kind by the Third Age. Balrogs and wizards share a common ancestry. Both are angelic ...

All of this took great power, but Ossë was limited outside his realm of sea and coast. Durin's Bane is the name given to the Balrog of Khazad-dûm after he destroyed the Dwarf king, Durin VI.