User blog comment:FairyRaven/Fairy Tail Chapter 336: In Order to Live Today to the Fullest, Review and Commentary/@comment-7418318-20130621152145/@comment-7418318-20130621182835

I don't think so. Unless Obra's pet just used Ivan (without his knowledge) to get into position, he seems too far down the chain of command to orchestrate such a huge deception.

And with Ivan I can't really see a motive right now.

I was more thinking about Zeref, Mavis or Shadow. While we have some indications that this Shadow might really be a hidden aspect of Rogue's psyche, it still might turn out to be a seperate being (maybe even Skiadrum). With Zeref you can never tall what he's up to or how he's changed since Tenrou Island. And Mavis... while she did acts mostly good, she still might turn out to be bad news who only helped the living FT members to further her own goals.