Board Thread:General Discussion/@comment-25926288-20150928010102/@comment-25926288-20150928120822

The wand is the light half and the user has to be the dark half. That means the the Apprentice had very powerful Dark magic, even more powerful than Zelena's.

Regina has always been an average witch. YOu can't suddenly become more powerful. REgina has been training for at least 10 or so years. She's likely reached her greatest potential and the only side she can grow is the Light magic side. I assume as your light magic grows stronger, your dark magic gets weaker.