Equestria girls Fluttershy Angel switch bodies

I wonder what spell Sunset screwed up for this to happen!!!, What a minute, how'd she use magic period if she's human in the human world without her horn???????? Did her lust for revenge cause her to foolishly sell her soul to the devil or something!!!!!!! I NEW THAT HALF ASSED "REDEMPTIOM " ENDING WAS A LOAD OF CROCK !!!!!!!!!!!!