The Eylfāri Moon
The light of Nūlēun is so faint that many never see the Eylfāri Moon except when its shadow passes across the face of its companion spheres. The deep violet moon is called the Eylfāri Moon because the Eylfāe are earliest people to have charted its motions. Nūlēun is important to the Eylfāe because every ten circuits of the moon mark one Eylfāri year.