Title: The Return of Lily Potter

Rating: T

Summary: When Lily Potter died she goes to the palace of Hades and asks to talk to Hecate. She makes an deal to become a protector of Hogwarts due to the prophecy that links Harry to Voldemort she trains with the gods to become a force to reckon with. Follow her as she protects Harry and his friends, makes some Slytherin's fear her, repairs her connection with Severus, and confronts the man that ended her life. Crossover of Percy Jackson.

Disclaimer: I don't own any of Rowling or Riordan's characters and I'm making nothing from this.

Chapter 1: Death is Only the Beginning

Lily's POV

The Killing Curse hurts, and I mean it hurts really badly! It feels as though you're getting punched in the chest. Your heart stops beating and then Hermes comes to you. Of course I think that he just takes different forms so that you can't tell who you're looking at. As a demigod child of Hecate, like my brother is, we can see Hermes as exactly who he is.

"It's time to go," Hermes told me.

I really didn't want to go, I wanted to be with my son, but I had no choice. So I took his hand and we vanished. When I appeared we were at DOA records. Hermes said something and the grumpy man, can't remember his name, motioned me to follow him. I went into the elevator and we went down, my clothes changing into the grey shroud that all the dead wear. Finally we were placed on a boat and I went across it to the other side.

"You will go to Hades palace," he said, "Eat of the food and drink of the waters of forgetfulness. Trust me, shade, you don't want to remember your death."

I sighed and headed for the palace.

When I entered a huge feast was waiting on us. James was drinking something, but I just couldn't. The food didn't even tempt me. Forgetting my death didn't tempt me. I saw Hades and his wife standing there. I walked over to them and bowed.

"A demigod," Hades said, "I'm surprised that you're here."

"Voldemort killed me," I told him, "My son, is he dead?"

"He survived," Hades said, "But Tom has managed to evade me."

I could tell that he wasn't happy about this.

"Lord Hades, I don't want to forget Harry. I don't want to be down here, even though I know that you'll never let me go. I wish to make a bargain."

"A bargain," Hades said, "You have nothing that I want."

"How about Voldemort's final, and total, defeat," I suggested. "I know that Harry is in grave danger and I can't stand the idea that he will be unable to be trained. He's a legacy of Hecate and a son of Apollon. He needs to be trained."

"You have a brother," Hades told me.

"I'm afraid that he will look at Harry and not see that he's not James's son," I told him, "I know that my mother has a protector of Hogwarts that died a couple of decades ago. I wish to take that position."

"I agree that's a good idea," my mother said and I turned to see her enter.

James, and the others, had already gone. I knew that he didn't remember me anymore.

"I can't allow a soul to leave the underworld."

"The world is already on its head," Hecate told him, "One more soul won't make any difference. A protector is what Hogwarts needs. Imagine the fear that will go through Tom when he sees that Lily has lived even though he personally killed her. Imagine the pleasure that you will get from that fear. He will finally fear you, my lord."

"For her to be allowed to leave she must agree to become immortal, a goddess. I won't allow her to leave any other way."

"Then I will do it," I said at once.

"I'll talk to Zeus about a meeting,"

In the end it was agreed to allow me to be granted godhood. I would forever be the protector of Hogwarts. I knew it was because the gods wanted Tom gone. But I also knew it was to prevent another dark lord, or lady, to come forth. And then my training began and I was given my limits. I could remove curses, I could curse someone, but most of all I could remove a threats magic to make them unable to gain supporters. I was Lily, goddess of curses, limitations, and the protector of Hogwarts.

Ten Years Later….

"I swear I'm going to kick Ares ass all the way to the other side of the world," I swore to Artemis.

"Is he still trying to attack you?"

"Yeah," I said. "He thinks that just because he's a major god that he can treat me like I'm some kind of prize. No, I refuse to have him in my bed."

"So what did he do when you told him that?"

"He got all manly angry and called me a minor nothing. He's getting his manhood repaired by Apollon."

"Men can be such pigs."

"Yeah, to bad Ares don't oink."

"So did you have any man friends when you were alive, and mortal?" Artemis asked me.

"Yeah, but they were still pigs. Well not all of them. Remus was really sweet and kind, loves books, but-."

"He's a werewolf and all that jazz."

"Yeah, he is," I said, "But, gods, he's still hot."

"Hot! What your brother would say if he heard you talk like that."

"He would do no such thing," I said. "Gods, he's a couple of weeks older than me and he acted like such a-."

"Brother," Artemis finished and I nodded. "At least he cared."

"He called me a Mudblood."

"Did he know that you're a demigod?"

"Well, no," I said. "He didn't even know that he was my brother."

"Should have showed him," she suggested.

"Yeah, I should of."

"LILY, YOUR NEEDED," Boomed Zeus's voice.

"Drama, much," Artemis muttered, but I heard her.

"Better get going," I told her and I vanished.

When I appeared in the throne room I found the whole Olympians there, including Hades and Hecate but minus Artemis. I bowed to them and then stood up.

"Your training is over," Zeus told me. "In return for your sacrifice of your mortality your time as a protector of Hecate's realm has begun. Apollon has informed me that a stone that is Hades bane is being sent to Hogwarts. Go there and make sure that the stone isn't taken by Tom."

"He's found a host," Hecate said, "This is how low he's gotten. He will be at Hogwarts, where your son is going to attend."

"Then I'll collect Harry."

"It's your choice," Zeus told me, "You will be beyond our power."

I nodded and then I was allowed to leave.

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A/N: I decided to redo this story and have things happen at the beginning. Lily does die, but she's made immortal so that she can protect Harry. Her brother is still Severus but she will have a more active role in Harry's life. Oh and there's no Percy Jackson.