In the tales of the Ewe people of Ghana and Tongo, the adzic is a vampire that takes the form of a firefly and of a human if captured. They are said to possess people, regardless of one’s consent. That person was then labeled a witch, because a witch would make their victim’s poor, from the influence of the adze. Women with brothers, old people, and the poor were accused of being possessed by an adze. The destructive power of the adze was against the family of the witch to whom the witch was jealous of.
The adze is also said to be dangerous without a witch. They would, at night, pass through closed doors and suck the blood from people as they slept. The victims would then become sick and die. They hunt children and feed on palm oil, blood, and coconut water. Many fear this creature, because there is no way to defend against it.
(Source: Bunson, Matthew. The Vampire Encyclopedia. 1993.)