How would dragons fly without wings?

There are many Scientific theories that I just came up with on how anything could fly without wings. For a dragon, it could have magnetic friction waves in the scales to create thrust. Or it could drink water and have an organ that separates the molecules in the water, using the oxygen to breath on at high altitudes, and the hydrogen to go into an organ along it's back to float like a blimp, and use an eel like motion to move about. Or, if this dragon will be implemented in a fictional environment... MAGIC!