Darkness Returns to Middle-Earth

Rhiannon is a fairy princess of the Enchanted Forest realm. A realm hidden since the first battle for the ring. One where all magical creatures outside of wizards and elves room. The fairies and mermaids are en-charge of protecting the forest creatures. So when they felt the power of the ring return. Rhiannon took it upon herself to help destroy the ring of power. How will the fellowship react to a fairy joining the fellowship? How will Rhiannon help on the quest?