*cough* Magi features parallel world as well. You seems to be forgetting that Aladdin showed them not only to other but even during the very first chapter, Aladdin was looking through Parallel world. Also, remember when Aladdin and Alibaba were fighting about which sides of wall to break. The top and bottom related to the hierarchy cosmology thing and the horizontal ones- the one involving parallel world. So no, not just universal. A person controlling Sacred Palace scales to Multiversal at minimum. And the you have to remember that to a god of higher dimension, the things from lower world are fiction. They don’t even exist for them except in shapes of stories and dreams.