Ooooh, now I am envisioning an eccentric, goofy stage magician with a fondness for slime named Ivan Ooze who performs at children's birthday parties, but business has been drying up and his wife is about to leave him due to their financial difficulties. He could ultimately merge with the purple slime symbiote, before becoming the toughest villain they've faced to date. His transformation could be similar to Joker's in "The Killing Joke," and then he ends up betraying Zedd and Bandora, imprisons them, and destroys the Command Center and the Nanosuits, setting in motion the journey to Phaedos for the Rangers. 

Although Ivan's face and voice will be that of the human magician (and modeled after actor Paul Freeman), we could say the symbiote has some fragments of residual memories from Bandora and her descendants due to his close proximity with the Purple Nanosuit during his gestation period. We could also use inspiration from Majin Buu in DBZ to make him an exceptionally hard villain to kill, with a few false victories before he is actually permanently defeated.