Shadowfax

This noble creature was the chief of the Mearas of Rohan at the time of King Théoden. At one time, Gandalf was attempting to rouse Théoden to an awareness of his danger from both Sauron and (possibly) from Saruman, but Théoden at that time still believed the evil councils of Gríma Wormtongue and hence did not heed Gandalf's words. He angrily bade the wizard to take any Horse he wished ifhe would leave as soon as possible. Greater still was the king's anger when he realized which Horse Gandalf had taken. Shadowfax served Gandalf well throughout the War ofthe Ring, withstanding all of the terrors of Mordor that they faced together and outrunning even the Fell Beasts, who were winged.