Chaos Dragons are nasty nasty beasties. They continually change over time and tend to migrate all over the planet. No one knows what the oldest Chaos Dragon is, because of their ever changing forms and fast healing. Only way to know its a Chaos Dragon is it will always have 6 limbs.

So here's Vixen fighting a Chaos Dragon. They may be hard to bring down, but if anyone can do it, its Vixen. And look- she's not even using her flames. XD