With the secret re-opening of Starswirl's portal happening deep within the caves behind Canterlot, a new research mission has been commissioned by the Royal Society of Explorers. For those of you that haven't been following the comic, this one allows you to travel to other worlds while remaining a pony. Unfortunately due to a limit on the energy available at the moment while Twilight figures out how the thing fully works, only one pony will be able to pass through and return safely.
As an ambassador who has been contacted via a cross-dimension communication spell, you have been picked to choose which pony it will be out of these five: Rarity, Twilight, Lyra, Trixie, or Celestia. Why only those? Because it requires a horn to help channel, and they just happened to be doing various things at the castle when Celestia cracked the portal code!
