Unicorns of Balinor: The Secrets of the Scepter (Book Six)

The Shifter is desperate and his army is strong, with the aid of the fearsome Shadow Rider. In order to gain the power and wisdom needed to rule Balinor and defeat its enemies, Arianna must undergo a rite of passage. She will face three trials, and if she succeeds, she will gain three gold rings for the Scepter and be able to use Deep Magic against Balinor's enemies.