The explanation of Elrond about Orcrist and Glamdring, the swords found in the troll cave by Gandalf and Thorin, is suddenly cut by a dialogue between Bilbo and Balin. Orcrist and Glamdring were forged in the First Age of the Middle Earth for Ecthelion and king Turgon respectively, to fight against the Balrogs sent by Morgoth (the first Dark Lord before Sauron) to rule the Middle Earth.