Mass Random Guessing

I was watching the new episode again and I had this weird thought...a crystally thing that banishes evil, representing unity...where have we seen that before? Six of those things actually...

Is the crystal heart the seventh Element of Harmony? Were the Elements forged by the crystal ponies? Gah, this raises up so many questions!

As for how this influences Revival, not much. Nothing's changed. If this ends up being true, I'll think of something, don't worry.