I, the Hidden Villain, Raised the Protagonist

After landing in a different world, Javas - now Cassius Trojeor, has become the new Count after slaying the final obstacle, with overly loyal and ambitious minions by his side. His secret? He’s a several century old vampire with a thirst for monster blood. The problem? He’s a villain in an old school revenge fantasy series spanning several books. His character was the first novels final hidden villain. His solution? Raise the protagonist to escape this hellish world.