Zack transmigrates into the Ben 10 universe and discovers a System granting him the Carnitrix—a reality-warping device that transforms him into corrupted alien versions of Ben's heroes. Where previous users faced madness and death, Zack commands every transformation without consequence. As Gwen's adoptive cousin, he planned to observe the story safely. That changes when Ben finds the Omnitrix. Zack's power expands: each new alien form grows stronger, his control deepens, and the price disappears entirely. He'll rewrite the narrative completely, evolve past normal limits, and master abilities designed to destroy other users. And when he obtains Alien X? The dual personalities cease to exist. One mind. Unlimited strength. *'I can use Alien X without internal conflict? Perfect.'*