In time she will gain the title of "Mater Domini Impiarum Animarum" or "Mother of The Damned" to translate.
Crafted behind the methods of the ancient alicorn civilization that through accident was discovered by the Royal Equestrians of the modern day, Her component Queens, and sole king turned Queen via magic acquired this magic, stealing it from under the Equestrians noses. Comprising of a suffering Changeling Queen, her children undergoing starvation and now cancerous movements of succession from within her broods. A banished Nightmare Princess, who's throne was stolen from her in her mind in her vain attempt to seize control of what she thought was rightfully hers, only to loose her very physical manifestation until now. Last but not least a cinder of a former King, whom was thought to be eradicated in an attempt to retake his crystal dominion. Now after years of suffering and crawling in the shadows had finally gained strength to reform said physical manifestation and through archaic means had revived an empire's worth in military power, with legions of the undead now at his beck and call. Now turned mare and part of this fusion, Empress Sacer Malum shall lead her growing Kabul on a crusade of vengeance and reprisal.
Illustrated beautifully by Nancy-05 And soon to be seen in the comic "Time of the Fusions"