From Britain comes a webseries in the supernatural/fantasy genre for teens. Emma finds a bag which has a necklace and then a mysterious scroll appears next to her saying that it'll give her powers. "This necklace can give you power, but use cautiously for there are consequences," it says. Emma and her friends seem to be anything but cautious.
Note: Only four episodes made, and the final one seems to end where the story starts to take off. Let's hope they make more.