Dark Necromancer Harry and Ginny
Looking for a fake where necromancer in practice, Harry finds out that Ron is not actually alive. And then finds out , Ginny is also a necromancer in practicing who is controlling ron. It is a tomarry but also it is a Ginny x mentor necromancer. I don't remember the mentors name. Harry tried healing Ron, but he came back to life and tried eating him. And towards the end , harry and tom are practically immortal and he keeps reviving Ginny every time she dies.