The Ancient Spirits of Evil are evil spirits that Mumm-Ra summons in order to transform himself into Mumm-Ra, the Ever-Living. In addition, he sometimes invokes the Ancient Spirits of Evil to transform himself from Mumm-Ra, the Ever-Living to other forms to suit his purposes, such as the Netherwitch (The Astral Prison) or Diamondfly. The spirits are represented by four large statues surrounding the cauldron.

Mumm-Ra uses the following invocation to summon the spirits to perform his transformation:

"Ancient Spirits of Evil,
Transform this decayed form,
to Mumm-Ra, the Ever-Living!"

History[edit | edit source]

The Ancient Spirits of Evil are the source of Mumm-Ra's powers and they control him. They would provide Mumm-Ra with whatever knowledge they could give him.

When the Ancient Spirits of Evil were getting disappointed with Mumm-Ra's repeated failures, they demand that he destroy the ThunderCats or else he, the Mutants, and the Lunataks would be forcefully removed from Third Earth, they make Ma-Mutt disappear as an example. When Mumm-Ra fails and the deadline passes, the Ancient Spirits of Evil trap Mumm-Ra in a crystal with his transport pyramid and cast him away from Third Earth. When the ThunderCats decide to colonize New Thundera to rebuild it after destroying Mumm-Ra's pyramid, the Ancient Spirits of Evil free Mumm-Ra and rebuild his cauldron on Third Earth. Since then, they would summon one of their minions to help Mumm-Ra in his plots to destroy the ThunderCats.

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