Talk:Twilight Sparkle (Sci-Twi)/@comment-14250-20170903200553/@comment-26423071-20171227193002

She died when Sci-Twi accepted Sunset's offer of friendship and rejected the negative energy that Midnight Sparkle was made of.

Same way Darth Vader died when Anakin Skywalker sacrificed himself to kill Palpatine and save Luke's life.