Following Twilight Sparkle's explanation of the scientific method, Diamond Tiara says the sonic rainboom is a scientific phenomenon. Scootaloo insists it is magic. The Ponyville schoolhouse is the scene for an unprecedented intellectual dispute.
Luna has retaken her rightful place on the throne of Equestria alongside her sister, Celestia, but while Celestia rules the day, Luna's night brings forth a monster. A monster the likes of which Equestria has never seen. A Beast of Flesh and Metal