Board Thread:Episode Discussion/@comment-23712247-20160203074906/@comment-27684451-20160209062914

I think there may actually be something to the whole "Moon Grimm" thing. As we've seen, some of the songs from the soundtracks have predicted actual events in the show. I the song "Die" the chorus goes:

" Feel it everywhere and you see it growing,

Enemies arise and the hate is flowing, Shattering the moon and bloodying the sky."

Grimm are atracted to negative emotions like hate, so dragon grimm breaking the moon and flying around killing people would fit this line almost too well.