Due to an editing/publishing error, all of Twilight's friends have now 'officially' died of old age. This leaves an immortal Twilight to grieve over the tragedy of how she outlived all of her friends and will continue to do so for the rest of her eternal life.
Seeing the obvious pain that this news is having on Twilight, Princess Celestia moves to console her with the help of her supposedly-but-actually-not-really-deceased friends.
Cover image belongs to Shawnyall.