She was killed during the war between the Midlands and D'Hara when Panis Rahl, the ruler of D'Hara, ordered a quad to kill her. The quad broke all of her bones and left her for Zedd to find. When Zedd found and attempted to heal her, a Worm Spell was activated which then killed her.
Before the quad had left, they also kidnapped Zedd and Erilyn's daughter. Later however, with the help of Abby, Zedd was able to save her.