Umaroth is an Eldunari. He is pure white. His rider used to be Vrael, the leader of the Riders. Vrael was killed by Galbatorix on Ristvak'baen, the "Place of Sorrow." He was found by Eragon and Saphira on Vroengard in the Vault of Souls along with the eggs for the dragons in for the pupil rider and many other Eldunari.