This is a crossover of Merlin and the Magician Trilogy by Jenny Nimmo! Since apparently they don't have that series! Gwyn accidentally releases Morgana's ghost. Merlin and Gwyn have to stop her before she destroys the world.
Rated: K - English - Friendship/Adventure - Chapters: 6 - Words: 6,370 - Updated: 7/18/2016 - Published: 6/23/2016 - Morgana, Merlin - Complete