The Crystal Empire - Part 1

The Crystal Empire, Part 1 is the first episode of the third season of My Little Pony Friendship is Magic and the fifty-third overall. It is the first episode of a two-parter which begins the season, and the 3rd opener with two parts.

Summary from Shout! Factory
"A magical empire has suddenly appeared in the arctic north of Equestria, and Princess Celestia needs Twilight Sparkle and her friends to find a way to protect it. While her friends try to keep the Crystal Ponies occupied at the Crystal Faire, Twilight Sparkle searches for the hidden Crystal Heart that is the key to keeping their empire safe from harm!"