From Creatures Wikia
The Uriel Norns were created by Nimue. They are available for Creatures 2 only and occupy Grendel slot U. They use the Golden Desert Norn genome and represent the element air. To begin with, Uriel Norns are the delicate colours of the dawn sky. As adults, they gain wings in the colours of the rising sun, although they are unable to fly.
The Uriel Norns can be found at Creatures of Avalon.