"Northern Lights"

These horses only appeared in collections released before the herds were included in each card or their herd was never clarified.
 * Brigid
 * Brisi
 * Conall
 * Danu
 * Donn
 * Embarr
 * Erinn
 * Firewalker
 * Froya
 * Fylgie
 * Iduna
 * Jonas
 * Kelpie-Pooka
 * Lakehorse
 * Lugh
 * Melusine
 * Mjolnir
 * Mystery
 * Nuala
 * Ran
 * Rauni
 * Rhiannon
 * Signy
 * Skinfaxe
 * Sleipnir
 * Thor
 * Urd
 * Viking