Complex sentence: Before sending Ella on her way, the fairy godmother warns the magic will be broken at the last stroke of midnight, and casts a spell to keep Ella's stepfamily from recognizing her.
Split into simpler sentences: Before sending Ella on her way, the fairy godmother warns her that the magic will be broken at the last stroke of midnight. Finally she casts a spell to keep Ella's stepfamily from recognizing her.