Naruto Master of Dark Arts

What if Naruto was trained by someone before he had become an genin? What if he was trained in both black magic and Alchemy? how could this blonde hair shinobi turn into something much more stronger? Someone that refuse to bow or knee to anyone and will take what he wants anyway he desires. This is a story of an gray Naruto but also one that's a dom. Harem pairing as well.