User blog comment:B214/Question and Answers 4/@comment-24502975-20141102214513/@comment-24502975-20141103000808

The Norse area uses formulas for their magic as well. Angels on the other hand, probably have their own system of spells that the God of the Bible created. Not magic, but not demonic power either.

And regarding teleportation: I'm... not too sure how to answer that. I guess the 72 Pillars can teleport through demonic power, since it has the house crest on the magic-circle, but everyone else has to use magic? (Low-class non-reincarnated Devils are from one of the 72 Pillars, right?) Rias did make a mistake in where she teleported in Rias in Wonderland because of her emotions (which tie in with imagination).