Gothmog, Lord of the Balrogs, high-captain of Angband, was come; and he drove a dark wedge between the Elvenhosts, surrounding King Fingon, and thrusting Turgon and Húrin aside towards the Fen of Serech. Then he turned upon Fingon. That was a grim meeting. At last Fingon stood alone with his guard dead about him; and he fought alone with Gothmog, until another Balrog came behind and cast a thong of fire about him. Then Gothmog hewed him with his black axe, and a white flame sprang up from the helm of Fingon as it was cloven. Thus fell the High King of the Noldor; and they beat him into the dust with their maces, and his banner, blue and silver, they trod in the mire of his blood.
“Of the Fifth Battle” - The Silmarillion - J.R.R. Tolkien