Talk:Princess Celestia/@comment-3410511-20150520001623

http://www.equestriadaily.com/2015/04/rumor-questionable-season-5-episode.html#idc-cover

If Nightmare Star doesn't appear in that Luna nightmare episode, she could be the main villain for The Cutie Remark.

Scenario: Starlight Glimmer returns, and uses her cutie mark magic of Princess Celestia and Princess Luna. She takes something from Luna and put it in Celestia. The effects did not had the results she was expecting, and accidentally make Nightmare Star.