Satou explained when he developed Gravity Magic from Demons that Demon magic, at least as he sees it, is unique destructive. Meaning its main focus is just causing as much destruction and chaos as possible. As for your question, Gravity Magic would be an example.
Dragons actually don't use magic a whole lot because they have specialized claws and fangs that actually are more effective than most magic. Their skin is also insanely tough. It got to the point that Heiron even told Liza that even at her Level 90+ states, she couldn't actually even harm him.
Instead, what Dragon tend to use when performing magic is called Primeval Magic. Which is where tremendous amounts of mana is used to force a change on an object, not bound by magic type or class. Like turning rock into a goat. Or a fang into a spear.
Besides, Primeval Magic, all other magic is classified as Modern Magic, where it was developed by Demon God using the Dragon Vein Authority to allow Humans and other species to perform magic much easier.