The Tree of Life is the 50th chapter of Brisingr. It takes place from the view of Eragon.
Summary[]
Eragon finds that Rhunön has sworn never to make another Rider's sword and that Támerlein doesn't suit his fighting style. Because Solembum told him to, he looks under the Menoa Tree for the weapon and Saphira threatens the tree with fire when they fail to find it. Eventually, it surrenders a lump of brightsteel.