The Villain Duke's Rewritten Fate

Cassian Valerian was born into a scream of a storm, the supposed "golden heir" to the most terrifying military bloodline in the empire. To the rest of the world, his life looked like a winning lottery ticket. Power, prestige, and a legendary father—what more could a kid want? Except for one massive, terrifying problem. Cassian isn't just a baby. He’s a guy who remembers a past life, a past world, and most importantly... a past book. See, this world—this "Blackstone Fortress" and the "Valtheris Empire"—it was all just a story he used to read at 3 AM. And in that story? Cassian Valerian wasn't the hero. He wasn't the rival. He was a goddamn footnote. A minor character destined to be slaughtered in a political hit-job before he even hit his eighteenth birthday. Now, he’s back at the very beginning, and the realization is hitting him like a freight train. If he plays by the rules? He dies. If he follows the "original plot"? He ends up as a bloody stain in a dark alley just to give the real protagonist some character development. Fuck that. In a world crawling with ruthless nobles, unstable magic, and secrets that would make a sane man jump off a cliff, Cassian has one goal: Survival. He doesn't care about the "intended" ending. He's going to tear the script apart, grow stronger than anyone thought possible, and rewrite his own fate. Even if he has to become the very villain the world was taught to fear. The story was written in stone. Too bad Cassian just brought a sledgehammer.