Lord-Skeletor
Before Sunset Shimmer went to the human world, there was a criminal she fought who called himself the master, the vilest and most evil pony Equestria has ever faced. She fought him furiously until his essence was sealed away into what would become Sci-Twi’s magic capture device. Now Sci-Twi uses the device to absorb magic, making the master stronger. So strong that she sometimes gets possessed by him and acts like a completely different person. The Master determined to be set free, tricks Sci-Twi into opening the device and looking into his essence. Now the Master is reborn, Can Sunset and her friends stop this new evil?