A philosopher once asked, Are we human because we gaze at the stars, or do we gaze at them because we are human?
Stars are magical humanoid beings who live in space and come out at night to shine. They have eternal life and once fall, possess something that a lot of people from Stormhold want. Badly. That is, their heart. He who possesses a heart of a star will have eternal life'. The effects of this will transform anyone who consumes it into their old, youthful self and provides them with immortality.
Witches, such as Lamia and her sisters, are very eager to get a heart of a star and show no empathy or remorse when attempting to cut out their heart.