After breaking her leg in the middle of the Everfree Forest, Applejack is forced to take shelter with Rainbow Dash in an abandoned cabin in the woods. Historically, this sort of thing has only ever ended well.
Discord's power was something that always frustrated Twilight. All that power, with no effort, no cost. So when Discord offers her a chance to learn his secrets, Twilight quickly agrees. Unfortunatly all things come with a price.