Oblivious to all the commotion that had just occurred in his brother's bedroom, the Riley from this universe opened the door, meaning to ask his older brother a question about their video game console. Instead of Jeff sitting at his desk, Riley was shocked and horrified to find a massive monster inside the room. Before he could even get a good look at what it was, the beast flew over to the helpless boy with relentless efficiency and effortlessly pinned Riley to the floor with a single wicked claw. The talons scraped his soft skin, producing bloody streaks where they connected. Riley was in a state of shock and could only accept that this was the end, when suddenly the beast relented.
Riley, realizing he wasn't dead yet, finally opened his eyes to get a closer look at his captor. It was some sort of draconic creature with black and white scales, huge wings, and a more limbs than normal. "Who are you?" he said meekly.
The dragontaur replied. "I'm...you" he said with a powerful voice. Despite the deep timbre and reptilian inflection his words now had, even Riley could tell this dragontaur was a teen like him. He allowed the beast to continue.
Evil Riley explained how he had tricked Jeff into giving him control of the Chronivac, allowing him to secretly become a living Chronivac with all its powers. He then gleefully recounted how he had forced Jeff to become his rear body, merging his head with his ass and stealing his organs and limbs to use as his own. Riley gulped as he noticed evil Riley's jagged cock hard as a rock. Had he stolen that from Jeff too? As evil Riley ended his story with stating his plans for world domination, he allowed Riley to sit up and take it all in.
"Even this name we share, 'Riley', is unfit for a ruler like me. I shall be known as Zephyr, first dragon god king of the universe!" Riley could tell that Zephyr was going slightly mad with power, but could do little to stop him.
"Now, my alternate self. What should I have done with you?"