Black Arrow

The Black Arrow was an heirloom of the house of Girion passed down to Bard. It was his last arrow remaining when Smaug attacked Laketown and, directed by a thrush, he shot it into a weak spot in the dragon's armour killing him.

The Black Arrow was forged by Thror the Dwarf, who was "King Under The (Lonely) Mountain" according to The Hobbit. It is not known if it had any magical propeties, but Bard said that he had succesfully retrieved it every time he used it (like Beleg's arrow Dailir).