[Don't mind a woman in an ominous black cloak on the video with a twisted smirk- and thanks to the way she manipulated the shadows of the room, it only looked more like she was cloaked in darkness.]

...I'm a user of dark magic, known as the Witch of Betrayal in my world. To say the least, it comes naturally to a truly evil being like me.

[A small, lifeless chuckle, as she turned tendrils of darkness in her fingers. Knowing Caster, she was basically just here to be an ass and scare Delia- mostly out of spite.]

Why not simply use your new power to serve your own ends? it's what I've always done.