"An invitation?" Celestia's curiosity was piqued immediately. It was uncommon for her Nephew to send her a formal invitation. Those invitations were reserved for events Blueblood believed she needed to be at. Brushing aside the bill with her telekinesis, she picked up the envelope and turned it to view the front... And to her mild surprise, it wasn't addressed to her. No, this invitation was addressed to Neil of all ponies.