User blog comment:FairyRaven/Fairy Tail Chapter 328: Zodiac, Review and Commentary/@comment-112.205.41.120-20130421090106/@comment-7418318-20130421095616

Maybe that little sphere for remote communication that Grandeeney sent to talk with Igneel earlier is something that all three of them can do. That way they could observe what's happening in Crocus without giving themsefls away.