Ayahuasca, or Spirit Vine, is an elven like plant monster with mysterious origins who appeared in Celenia after the Catastrophe in the Fourth Age. She settled near a magical glade deep in the Celenian Forest, killing any who trespassed in her domain and turning those slain into the Vineborn.
She became so much of a threat that the Celenians eventually decided to enlist the aid of the trespassing Fellowship of Sarilstad to defeat the monster in exchange for the fellowship's lives. However, the fellowship ultimately struck a bargain with Ayahuasca instead and freed her from the bindings of runestones so she could roam outside the glade which had imprisoned her. She later assisted Arl Sandersen and Kareth in their search for Princess Alexandra Sarillius in Windshii.