Tree of BS more like. The Jyuubi is a glorified Venus fly trap?

Another thing that's been bugging me; Obito has never been shown to use Tsukuyomi in normal battle, how on Earth is now going to use it for the first time on such a massive scale? He's had no practice at it, the only one I would think that may be able to use it is Madara but even he hasn't been shown to be a genjutsu expert like Itachi was but more of a ninjutsu expert.