Astell walked back in to the room."I see you two have talked," she said looking at the distant sisters. "Luna, i want you to join me," she started. "For what does thou want me to join thou for?" asked Luna. Astell put a gag in Celestia's mouth. "I want to take revenge on our dear sister, Celestia,"answered Astell.
here is another song by magpiepony
Astell left the room. Luna ran to undo Celestia's gag. "DON'T DO IT LUNA!" said Celestia. "I think we have passed that point dear sister," replied Luna. "What do we do sister?" she asked. "I don't know, Luna, I do know you have to get out of here any way you can," said Celestia. "What about you, Celestia?" asked Luna. "It is me she wants to lash her anger on, not you, Luna. You don't have to be here, she would rather let you go than I," said Celestia. "No. I will not leave you behind nor will I take no for an answer," replied Luna.
