Twilight is disbelief, not long time Equestria is peaceful time until come strange creature name Alastor and terrorize ponies and other creatures. At first Mane Six and their allies fight him and his new Legion of Doom. But the most shocked that the harmony, the magic of friendship is not working him. No beat him, no drain his magic, he look like might of harmony never hit him. Alastor easily beat heroes and each fall like dropping flies. Why? Friendship is powerfull magic! Then why fail now? Then Alastor come to Twilight with grin and say "All hail emperor"