User blog comment:IamJakuhoRaikoben/Chapter 350: Gray vs. Doriate, Review./@comment-3424593-20130906205741/@comment-7418318-20130906213532

Maybe it's a third teammember for Dorirate and Minerva and apart from arial survailance it was also tasked with getting rid of members if they turned out to be useless or if they are about to reveal information that the guild would rather keep out of the enemies hands.

Or it was a mobile platform from which a portal can be deployed. If we assume that the timing between Gray's use of the Ice's magic and that eyeballs actions wasn't coincidental then maybe Gray's actions weakened whatever prevented that eyeball from forming a portal befor and now that a connection is possible it's either pulling Dorirate back to base for debriefind and/or punishment by his superiours.... or it might use his body as an energy source for opening the portal.

As for the magic-redirection thing, see my post below your copy/pasted version of this comment (or the other way round... whatever).