They resemble a Lizard , a Jackal , a Monkey , and a Vulture .
Ancient Spirits of Evil ( voiced by Jim Cummings and Kevin Michael Richardson ) - Four dark spirits that are the source of Mumm - Ra 's powers and his eternal masters .
Mumm - Ra resemble a Lizard , a Jackal , a Monkey , and a Vulture .
Ancient Spirits of Evil ( voiced by Jim Cummings and Kevin Michael Richardson ) - Four dark spirits that are the source of Mumm - Ra 's powers and his eternal masters .