My Little Pony: Friendship Is Magic #55
"Wings Over Yakyakistan" part 1 of 2.
While on a diplomatic mission to Yakyakistan, Pinkie Pie and Rainbow Dash are surprised to uncover an imminent attack on the kingdom by dragons! Will Dash be able to rouse the Wonderbolts to aid the Yaks in time to thwart the invasion?
Ties into the events of MLP season 7!