The heroes helped the town prepare for the Shade’s End Celebration. That night, as the town was gathered in the park for the revels, Malastraza landed and attacked Sheriff Autumn, who seemed prepared for her arrival. When she lept at him he grabbed her by the throat and ripped her incorporeal self from her body.
Rather than dying, her body, now shrivelled and darker, attacked those remaining including our heroes. At full power these heroes would be no match for the ancient Malastraza. Even against this… “husk” of what she was the heroes were hard pressed to survive.
But survive they did. When Malastraza’s corrupted body was destroyed, Sheriff Autumn released his grip. The non-corporeal part of Malastraza still had a furious glare, darting between the heroes and the Sheriff, but she backed away and gave a short nod before leaping into the sky.