After the changelings attack Canterlot, the Alicorns, combined with the royal guard, can easily defend Canterlot. Thirsty for revenge, Queen Chrysalis discovers a rumor that there exists technology to destroy the Alicorns, and Canterlot with them. The changelings attack Ponyville when only Rarity and Twilight Sparkle are at Canterlot. Discord awakens again, Chrysalis forces Celestia to activate dark magic, and Pinkie Pie deestroys changelings with her party cannon!