|“||The sword of Elendil was forged anew by Elvish smiths, and on its blade was traced a device of seven stars set between the crescent Moon and the rayed Sun, and about them was written many runes; for Aragorn, son of Arathorn was going to war upon the marches of Mordor. Very bright was that sword when it was made whole again; the light of the sun shone redly in it, and the light of the moon shone cold, and its edge was hard and keen. And Aragorn gave it a new name and called it Andúril, Flame of the West.||”|
–-The Fellowship of the Ring, The Ring Goes South
The sword Andúril is wielded by Aragorn II Elessar, son of Arathorn, the Heir of Isildur, Chieftain of the Dúnedain of the North and High King of Gondor and Arnor. It does not have a crafting recipe because it will, in the future, be obtained in quests. Now, however, it can only be obtained via Creative Mode.
Andúril was forged by the Elves of Rivendell (before the Fellowship of the Ring departed on the Quest of the Ring) from the shards of Narsil, which were formerly carried by the ranger Strider (Aragorn II). He used the reforged sword as proof of his heritage on several occasions - such as when he, Legolas and Gimli were confronted by Éomer (Chief Marshal of the Mark and future King of Rohan), as well as when the Aragorn and company confronted the shades of the Paths of the Dead.
The original sword Narsil, from whose shards Andúril was forged, was itself forged by the great Dwarven smith Telchar of Nogrod in the Blue Mountains - from whom it was eventually passed on to the Kings of Númenor, as after the sinking of Númenor Elendil (first King of [all or any of the] the Dúnedain and of Arnor and Gondor) arrived in Middle-Earth with it in his possession.
When Elendil was killed in the War of the Last Alliance and his son Isildur reached for Narsil, it was broken by the body of the fallen king(but snapped by the foot of Sauron in the films), yet was still used by Isildur to cut the ring from Sauron’s finger, thereby destroying his physical form and injuring his spirit.
Momentarily before Isildur’s own death at the Disaster of the Gladden Fields, the Shards of Narsil were rescued by his esquire Ohtar, who took them to Rivendell. There, they were claimed by Isildur’s son Valandil, and from him passed on to the rest of the heirs to the throne of Arnor (the future Chieftains of the Dúnedain) of whom both Aragorn II and his father were. Both Andúril and Narsil were and are regarded as the sword of the king of men.
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