User blog comment:Turtledrawer12/Hard dragon battle challenge/@comment-24840443-20140705043823

That is a difficult one. My gut says it would be the Changewing, because even if it did show itself for a bit, the other dragons would be so confused that the Changewing would have the opportune moment to strike. That said, the Nadder does have the spines. However, the Smokebreath would need to be in a pack and actually encouraged to fight, so I don't think that it would be much use in a fight.