Pesticide's True Form

He was born a unicorn by the name of Aaronaya. When he was 3, his parents abandoned him to save the little food they had to spare during the great winter that caused the hatred between the three tribes. He was taken in by a family of angels-a mom, a dad, and their daughter Aoris. Together they lived a happy life. however, at the time, the angels were used as slaves on farms to make the crops grow, so the family had to stay hidden. One day, Aaronaya got the idea in his head that if he could gain control of the land, he could enure his family's safety. However he hadn't the power to take the throne of the current king, so he did the usual. he made a deal with a demon, killing the demon with the angelic blade he had been given by his adoptive parents for self-defense. This was so he didn't need to take up his end of the deal. Little did he know it would be but the first kill in the raging bloodbath to come. That night while the angels were asleep, he snuck out and killed the king, taking his throne. He smiled as he then made a proclamation to set the angels free. He thought his family would be proud, he thought himself a hero. However, the next day the angel family were...disgruntled to say the least. Feeling betrayed by the ones he held higher than anypony else, he took his revenge. He held the angelic blade in his magical grip as his eyes glew a blood red, showing a demonic side to the blood in him, changing the blade with his demonic power he had been granted into a demonic katana with a dragon carved into the hilt, then duplicating it to create its twin. He used these new blades to get his 3rd, 4th, and 5th kills in a row-The dad, the mom, and Aoris in that order. Each kill was more brutal than the last. But he didn't stop there. From that night on, he changed his title to Emperor, and decided that Aaronaya was dead, changing his name to Pesticide, doing just as the namesake does, and rids the world of the pests in it. That night also sprung him to declare a horrific time known as the Angel Wars, where he slaughtered every single angel he could find. The killing was so massive, so bloody, so brutal, that almost every angel in Equestria was obliterated. As that time went on, more and more of his sanity slipped away as the hidden demonic blood in him took more and more control until he became the most powerful demon in existence. This, however, did not make him invincible. One day, a century or so after the Angel Wars, Starswirl the Bearded had stormed his way to the demon emperor's throne room, where he casted a curse on him. Pesticide was to be sentenced to Hell for a millenium and a half until a pony who was pure of heart would be born for Pesticide to be reincarnated in as an alternate personality. And I'm sure you see where that led. Ever since, he's been trying to regain the throne he had lost so long ago. There was only one way to break the curse, but the demon thought it impossible to find, so he practically gave up. The cure was true love's kiss. If he could find that, he could get his own body back, and all the demonic power he had with it. His reign has remained infamous in history books all across Equestria