Narsil is a fictional sword from J.R.R. Tolkien's legendarium, primarily featured in "The Lord of the Rings." It was forged by the Elven smiths of Gondolin and belonged to Elendil, the High King of Gondor and Arnor. Narsil is known for its exceptional craftsmanship and its role in the defeat of the Dark Lord Sauron during the Last Alliance of Elves and Men. After Elendil fell in battle, Narsil was broken, but its shards were kept as a symbol of hope. The sword was later reforged into Andúril for Aragorn, the heir of Elendil, signifying his claim to the throne and his role in the fight against Sauron.