After learning of his good counterpart, Mumm-Ra had gone to her temple with his henchmen as he planned to brainwash her into becoming his newest minion and turn her against the Thundercats. Once they arrived, Mumm-Rana took the fight to Mumm-Ra but his power was too strong for her to handle and was put under his spell

Mumm-Ra: You are in my power!

Mumm-Rana: Yes, my lord… Mumm-Ra… she replies in a monotone voice

Mumm-Ra: The mutants of Plun-Darr are your friends.he says, gesturing to Slithe, Jackalman, and Monkian

Mumm-Rana: The mutants of Plun-Darr are my friends…

Mumm-Ra: The Thundercats of Thundera are your enemies…! He says with an evil smile

Mumm-Rana: The Thundercats of Thundera are my enemies…