User blog comment:MerlinUSA/Lies My Dragon Told Me/@comment-5147915-20130208094402/@comment-5995315-20130213230209

Yes, Kilgharrah does talk in riddles and confuses Merlin. The dragon is a creature of magic, and some of what he says (like "the witch must die!"), although it makes perfect sense to him, doesn't make sense to Merlin (or us) from a human point of view.