Black Thorn of Brethil

As the Dragon Glaurung approached the Forest of Brethil, Túrin sought to calm the fears of the people who lived there by relating the story of Azaghâl at the Nirnaeth. Azaghâl was a Dwarf-lord of Belegost who had succeeded in wounding Glaurung and causing him to flee the field, showing that the Dragon was not invulnerable. (In fact Azagâl also died in this encounter, a fact that Túrin chose to omit from his account.)

After relating this story, Túrin drew his famous black sword Gurthang and held it aloft, announcing that he would use it to deliver a blow of his own to the approaching Dragon. The people around him were inspired, calling the sword the Black Thorn of Brethil, though few indeed rallied to his aid. Nonetheless, after great hardship the Black Thorn found its mark, giving Glaurung the mortal wound that Túrin had promised.