The Witch-king and the other Nazgûl rode from Mordor and Dol Guldur searching for the Shire. Four entered the Shire, and found that "Baggins" had moved to Buckland. Several Nazgûl 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 Nazgûl.
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 Nazgûl, the horse carried Frodo across the River Bruinen. From the far bank Frodo defied the Nazgûl. When the Witch-king rode into the water, Elrond, who controlled the river, released a flood that caught three Nazgûl and their horses. Glorfindel advanced and drove the terrified horses of the remaining Nazgûl into the flood. The horses drowned, and all nine Nazgûl were swept away.