Camelot S1 Ep 3 - Female AR & AP

Season 1 Episode 3 Guinevere
While at the nunnery, Morgan learned the ability to take on the form of her younger self. Sybil taught her how to shape-shift into her appearance as a child. When her father rejects her forever, she poisons his food with some unknown ingredients, in her shape-shifted form so that she won't be recognized. Merlin foresaw Uther's death while Morgan, transformed into a child, poisoned the king's food. He goads Morgan into a display of her powers. Morgan, after restraining Merlin, transforms herself into a little girl and then back into herself as an adult. The transformation is very painful and Morgan hurts herself during it. She ignores Merlin's warning not to mess with these forces.