Once Upon a Time Tales: Meet the Mistress of All Evil, Maleficent

Once Upon a Timethere was an Evil Queen — but she wasn't the only evil force in all the land.

This Sunday's episode of Once will introduce the self-proclaimed Mistress of All Evil, Maleficent (True Blood's Kristin Bauer). In the original Sleeping Beautystory, Maleficent is the vengeful fairy who casts a spell upon Princess Aurora, causing her to fall into a deep sleep after being pricked by the spindle of a spinning wheel. 

In the world of Once, however, Maleficent is an old frenemy of the Evil Queen (Lana Parrilla). "Maleficent is almost like a big sister to the queen," Parrilla teases. "She's taught her some tricks and they probably have created spells and curses together, so you will see that on some level."

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However, her arrival isn't pleasant. "When Maleficent goes to visit her, it's not necessarily coming from a friendly place," Parrilla says. "Maleficient wants something from her."

What, you ask, does she want from the Evil Queen? That will be answered in Sunday's episode of Once at 8/7c on ABC. Until then, hit the comments with your theories.