Alien dragons (Draco alienigenus) are among the rarest and most bizarre in all dragonkind.
They migrated to Earth, long ago, from another planet. It is not known how they traversed space but little is known about them anyway. They used to love (and still do) terrifying small towns and taking food from farmers.
They usually have between two to six wings, no breath weapon and are stronger, faster and more agile than any most dragons on Earth. They may be any color and have one to three tails, with a large number of spikes on each tail.