According to the myth, the Loogaroo is a woman who is in league with the Devil. She will have magical abilities only if she gives the Devil blood every night. She tries to give him blood of other creatures, or else he will take her own blood, causing her to die.
The Loogaroo can leave its own skin (usually under a "Devil Tree," a silk cotton tree) and turn into a flame or blue ball of bright light that haunts the night searching for blood to meet the terms of her deal. After she has collected enough blood she can return to her skin and retake human form.