Leon had grown a deep desire to find out what was happening to him. He was up every night in the castle library. He was reading every book on strange cutie marks, but nothing came up. He put his head down on the crystal desk. There was not a single mention of his cutie mark in any book or scroll. "Hey..." Starlight's tiny concerned voice broke the silence. He looked up to her levitating a plate of food for him, "I made you you, ugh, dinner. I figure you could use some help. I know what its like to not belong..."
Leon turned away, "Why help me? I am just a monster..."
"Hey! You risked your life for those kids." She snapped at him, "You deserve to know the truth. Leon I was a monster too. I hurt ponies.. I enslaved my entire village..." She sat by his side and made him look her in the eye, "But, you act like you are alone. When you have me...." She came closer, "I really care about you. We will find out who you are." She was inches away as she closed her eyes. But, suddenly, his hoof pressed against her lips and pushed her back from his face. She opened her eyes seeing him walk out the library, leaving her feeling crushed. He put on a cloak and hood over his head, skulked out the door, and into the night. Leon stopped, and then he looked up at the balcony seeing her stare at him. He looked away, then back with glowing yin yang eyes. He then quickly vanished into the blackness of the night like a ghost. Starlight just stared out into the night, "What are you?....."
Starlight turned away back to the room. She noticed a black book that Leon had been reading. That's when she saw it, the yin yang symbol on the cover. She, quickly, opened it and read out loud. "The yin yang cutie mark is a curse..... Those who are born with this cutie mark are born in pairs. It is unknown who or what created this curse or even why. But, the affected ponies will be both good and evil. They contain the power of light and dark magic. They are often consider deities and only appear as female and male. Making themselves known right before a world ending event or terrible tragedy. It is believe they feed off pain and suffering." She felt her body shutter, "The last time these ponies were spotted was the time of the windigu and are believed to be the reason for them. The curse of their destruction and misery to pony kind will end when one is killed. But, there is a word of caution. One will be yin the other yang. If yang dies harmony and unity will be spread across the world. But, if yin dies.... The world will fall into darkness and the pony race will face extinction........" She dropped the book as she knew why he ran away from her. "I have to tell Twilight!" She ran out of sight yelling for Twilight.
Meanwhile, Leon was in the forest standing in the darkness. His eyes closed to allow his ears to pick up any sounds of danger. All they heard were the rustling of leaves in the wind. He opened his eyes and they were still yin yang symbols. 'What am I?' His mind thought, 'Am I really yang? That couldn't be... But, it make sense. Yang be the one that make himself seem the most trustworthy... I wouldn't trust me.' He sighed the spoke, "I must be yang. It be the perfect cover. So fool proof I wouldn't know I was yang..."
Rarity voice broke his thoughts, "You are a very strange pony... I will give you that."
Leon jumped and turned to her, "How did you find me!?"
"Easy," she giggled, "I implanted a gem in your tail fur. My horn can track gems. Plus, I was looking for my sister. She is missing."
"Well, why are you here?" He asked in return, "We need to look for her!!"
"We shall, but I need to thank you first," she stepped toward him, "You helped Sweetie Belle get over our parents dying. And well its helped me a lot, too. Just having a friend like you, it's really hard to find. I don't know what it is, but just having some pony like you to talk too helps..." She blushed looking down and rubbed her right leg with her left hoof nervous.
"If you know what was good for you..." Leon turned away, "You'd stay away from me. You are already falling for my evil magic!"
"What are you even talking about?" She felt hurt.
"I am yang!" He felt tears fill his eyes, "I need to be destroyed before I hurt some pony...."
"Again, what are you talking about!?" She demanded moving to his side.
"Look," he looked to her as they nearly touched nose to nose and he froze....
"Leon..." She spoke, "Just, think about who you are. Not what some dusty old book says. You have choices.... That's what your cutie mark means... You can be good and evil. Or you could be one or the other. And from what I seen... I seen a good stallion... A stallion... I....I...." Their noses touched, forcing them to just stare at each other. From behind a tree, Starlight saw enough, and she ran away crying...
"I love you Leon..." Her eyes glinted, "You are truly my biggest gem in life..."
Leon broke away from her gaze, "No, this is wrong Rarity. Forget those feelings... And forget me... I am dangerous!" He backed away from her. Her eyes were filling with tears. "I am dangerous Rarity..... To you, to your sister, and to any pony!" He ran into the darkness leaving Rarity heart broken.
"FINE!" she screamed, "BUT, I SEE A GOOD STALLION WHEN ALL YOU SEE IS DARKNESS!!!! YOU WILL NEVER BE HAPPY!! YOU WILL NEVER HAVE FRIENDS, UNTIL YOU TRUST YOURSELF!!!" She buried her face into her hooves crying tears as she felt her heart rip in half.
Meanwhile, deep in the volcanic lands of the dragon empire a giant spire of rock was over looking a lake molten rock. On one side laid the old castle of an ancient evil. It was dark black, with giant smoke stacks rising from the center. Giant pipes fed molten metal into the castle. And from inside there could be heard a faint pounding sound. Once inside, the sound became apparent. The molten rock was separated into elements of metal in giant vats. Of which, were then hoisted high above a humongous factory. Thousands upon thousands of conveyors shuttled materials around. The vats poured down into huge mold castings, causing fire spill up. The molds would close shut, and soon reopen to reveal a head of Sweetie belle. The molds moved, allowing the metal cool. Once cooled off, a mechanical arm grabbed the head with suction cups. It spun around placed the head on a conveyor belt. Soon a robot press came down and removed the top of the robots head. Another arm came down and placed a mechanical brain inside the head case. Then, two more arms came from this side and fixed in green robotic eyes into the eye sockets. To the left was a body chassis being fixed with legs and a tail. Suddenly, hundreds of tiny arms came down around the two assembly lines. They forced in millions of wiring and gears into the body and head. Finally, a robotic arm grabbed the finished head, and placed it on top of the neck. It welded them together with spot welds. As the final, part and bolt of green magic fired down. Its eyes powered up dark green. It smiled evilly, coming to life. "Crush..... Kill... Destroy...." It put on dark shades, "Swag...."
Sweetie Belle stood high above from her observation deck. "Soon the world shall know," that voice spoke to her, "Our creation."
"Yes master," She replied, "We shall soon purge the world of flesh."
"Creator?" A Sweetie Bot smiled behind her, "Can I destroy you now?" Sweetie Belle face hooved groaning.