Best to get to the point, "The less 'desirable' part of my power, well, all of my power, comes from soul energies that I have taken from others. This energy drives my strength, speed, and healing abilities. I am capable of stealing souls because of a device known as the Void. I used it in the fight with Anton, but did not take his soul. I used it to take Wan into the Turtle." She paused, took a deep breath, "And I used it to kill some cultists in defense of Wan, Katara and Zuko at the turtle's head."