User blog comment:FairyRaven/Fairy Tail Chapter 328: Zodiac, Review and Commentary/@comment-5936871-20130419132113/@comment-7418318-20130419135659

Considering Jura's comment about all magic bouncing off the Dragon's scales, I don't think he will be able to deal with them, unless his earth magic is strong enough to shield others from the Dragon's attacks.

On the other hand he might just have a bad matchup against this particular Dragon and his element and might actually be usefull against Dragons of other elements.