The Witch-king and the other Nazgūl rode from Mordor and Dol Guldur searching for the Shire. Four entered the Shire, and found that "Baggins" had moved to Buckland. Several Nazgūl attacked Gandalf onWeathertop and tried to ambush Frodo Baggins in Buckland and at Bree. Five, including the Witch-king, finally found Frodo on Weathertop with the other hobbits, accompanied by the Ranger Aragorn. The Ringwraiths attacked the party, and the Witch-king wounded Frodo with a Morgul-blade. Frodo's wound threatened to turn him into a wraith under the control of the Nazgūl.
As the company made for Rivendell, the realm of Elrond Half-elven, they met Glorfindel, who loaned Frodo his horse Asfaloth. Pursued by all nine Nazgūl, the horse carried Frodo across the River Bruinen. From the far bank Frodo defied the Nazgūl. When the Witch-king rode into the water, Elrond, who controlled the river, released a flood that caught three Nazgūl and their horses. Glorfindel advanced and drove the terrified horses of the remaining Nazgūl into the flood. The horses drowned, and all nine Nazgūl were swept away.