Title: Snape's Demigod Daughter

Rating: T

Summary: Cassandra Snape comes to Hogwarts during Harry's third year. She's different from other students right from the start. And she has a very nasty view of the word 'Muggle.' To make things even stranger, for Harry, she's Petunia Dursley's sister and brings her sister along for the ride. A crossover of Harry Potter and Percy Jackson.

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

Chapter 3

"Are you saying that my Aunt is here," Harry said when Ron and Hermione told him what had happened.

Well Hermione talked about the scary daughter of Snape and Ron was the one that filled him in on exactly what had happened.

"And she's got magic, Harry," Ron added, "And I mean freaky scary magic."

"But that's impossible," Harry said, "My Aunt hates everything to do with magic."

"Well she says that she hates the Headmaster because he polluted her sister's mind," Ron said, "Honestly, Dumbledore doesn't pollute anyone's minds. And she called us second rate magical people and she's not even sacred of Tom Riddle."

"And what about Snape's kid?"

"Well I'm sure that Professor Snape would have known if he had a kid," Hermione said, "But she made this kid run away, I'm sure that you heard him screaming."

"Yeah, well I wondered what that was about," Harry said.

"Well I woke up and she wasn't in her bed," Hermione said, "What if, what if, she's hanging around to hex us."

"I think we should have a word with Dumbledore," Harry told them.

"Yeah, to give us some kind of protection," Ron said.

"We'll see him when lessons are over," Harry told them, knowing that Hermione didn't want to miss out on Divination.

When they entered the Great Hall they saw the Snape kid eating. She was by herself, so they didn't have to worry about any possible friends attacking them. However Malfoy showed up and, at first he thought that they had become friends, but she glared at him, said something in some strange tongue, and changed him into a pig. Everyone stared at this transformation and Harry had a bad feeling that she wasn't going to be an easy witch to go up against. She then got up and walked past him and his friends. He had no idea what he was going to do, but he was determined to find out.

"Come on," Harry said, "I want to know what my Aunt and Snape's brat is doing."

They both nodded and followed him.

What they found out horrified them. A large stone bench had been erected, though they didn't know what it was for. The sound of whimpering could be heard, as though it was a basketful of puppies. They had lost sight of Snape's brat but found her after a couple of minutes. She wasn't in her Hogwarts uniform, instead in a black dress that looked the same as the one that his Aunt was wearing.

" (Goddess Hecate)," his Aunt cried out in some tongue that Harry couldn't understand, " (We give this sacrifice to you to strengthen the wards against any monsters that might come and harm the students and us. According to the rules and laws that you have set up for such things by our ancestors, the Priestess of Hecate.)"

And to their horror a black puppy was brought up from the basket and Hermione screamed as its throat was slit. The blood turned from red to blue and the dead animal was placed inside of a pit. Harry felt that his dinner was about ready to come up, even if that should be impossible. We all had to close our eyes as one by one we heard the life end for these small creatures.

"Weaklings," Snape's daughter snarled. "See a bit of witchcraft and you hide your faces. Remind me to always remember that the only safe craft is from books for the three of you."

Harry opened his eyes and saw the blood on Snape's daughter's hand.

"Wash up and you can head to class," his Aunt said and she headed towards the lake. "Pathetic!"

"That's dark magic," Hermione at once said.

"Get a clue, little girl," Petunia hissed. "There is no such thing as black and white magic. Magic is a tool, like a knife. If I lay down the knife that I use to sacrifice it's not evil and it's not good. It's the intent of the person, not the magic. Understand the different for yourself, instead of what your damn Ministry puts down in those books that have brainwashed you. I'm using the blood of sacrificed animals to strengthen the wards. But I guess using that to strengthen the wards makes me a dark witch. Get over yourself and stop living in the world created by the Ministry and that blasted Albus Dumbledore.

"We practice our craft but we sure as heck going to judge yours. Personally I don't think any one here practices a craft, it's all jobs with the Ministry or at Hogwarts. So why don't you do me, Cassandra, and everyone else that practices real witchcraft a favor. Stop butting into our business and stop judging what we do. I'm sure that you can manage that, can't you?"

She then placed a cover over a pit and headed off with her jug of horrors.

"I can't believe that's witchcraft," Hermione said as we headed back to the castle, "Murdering innocent animals isn't what's found in books."

"Hermione, of course it's not," Ron said, "It's dark magic! But you can't get them locked up in Azkaban for that, though a warning from the Ministry for practicing paganism is what they'll get."

"I'm going to see the Headmaster about this," Hermione said, "We can't have blood being drawn and poor little animals killed."

"I agree," Harry said. "And I, for one, don't believe that she even knows what she's talking about. There's such a thing as black and white magic and dark magic is what killed my parents."

"I agree," Hermione said. "I don't know who told them this lie, but I'm sure the Headmaster will set them straight."

"That would be me," a woman said and they turned to see a woman setting on one of the benches.

She had on a long black dress like the one that Petunia and that Snape brat wore, but no knife. Her long black hair and eyes reminded Harry of Snape. The sky had suddenly turned dark and then a huge ball of light, two of them, suddenly appeared.

"I'm not Severus mother, if you want to know," she said.

Harry stared at her and then noticed a dog and a cat. The sound of air being passed made them hold their noses.

"Sorry about that," she said, "But she has a bad habit of passing gas, much to most people's annoyance."

"Who are you?" Hermione demanded.

She looked at her and said, "My, my, the little mortal that knows nothing about witchcraft, except what's in books, has a snappy tone. My name is Hecate, goddess of magic. I'm the mother of Petunia Evens and Cassandra Snape."

"The gods aren't real," Hermione snapped.

She gave Hermione an odd look and Harry had a bad feeling that this woman didn't like Hermione's tone.

"Then how do you explain the fact that Petunia can do magic," she asked her.

"She hid it from Dumbledore."

She smiled and said, "You speak highly of Dumbledore, think the world of him. Well I hate to break it to you, but that little tick is the reason that my daughter's sister is dead."

"That's not true," Harry told her.

"Oh I'm most afraid that it is," she said, "You three judge other witches because they spill blood. I hate to break it to you, but you have no right to judge others because of what has been sit down inside of a book. Just because you don't understand it, gives you no right to judge it. Just because people are open about being a witch shouldn't make it a crime."

"We want to be left alone," Ron told her.

She gave him an odd look and then said, "Well maybe some people don't agree with you."

And before Harry could say anything she had just vanished.

"What the heck?" Hermione asked, staring at the now empty space.

"I swear this place gets stranger by the day," Ron commented. "Come on, I want to get to class and forget that we ever saw her."

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"Looks like you've met my mother," Cassandra commented when she saw Harry, Ron, and Hermione.

"How-?"

"Shut up, Snape," Ron snarled. "I don't know what your mum is doing, but she's just like your father….evil."

Cassandra gave him an ugly look and said, "You better be careful how you talk about my mother. She might turn you into a polecat, which would be funny to watch."

The Gryffindor's gasped at her words and then someone said, "Don't threaten a Weasley. Just because your father is unpopular, doesn't mean that you have the right to insult someone that's popular."

"Does that even make any sense?" Cassandra asked him. "And last time I checked he was insulting my mother, first. So I think that you should shut up when you know that he's clearly at fault."

"It's not an insult if it's the truth," Ron said, "Going on and on about how, at least, you have a craft. Witches and wizards don't need a craft. We're here to learn so that we can end up working at the Ministry, or play Quidditch, or even teach at Hogwarts. Having a craft was outlawed by the Ministry, everyone know it."

"Oh really," Cassandra said, "Well I hate to break your little world apart, but I've been helping people out for years. And my sister is going to make sure that I continue to help those out that need it, going as far as doing magic right in-front of them. None of you can hide the magical world from people forever."

Everyone gasped, fear on their faces. Oh please, give me a damn break.

"You would expose our world because we dislike your mother."

"Hello, have you morons ever heard of Wicca?" Cassandra asked them and they all looked confused, "The religion of witchcraft that was founded by Gardner before World War II."

"What nonsense," Hermione said, "There are no practicing witches in England that hasn't gone to Hogwarts."

"Oh please, there are," she said, "And they didn't have to go to Hogwarts. There are books out there about potions, charms, and all sorts of things. And their being sold to people, people that are witches and practice their craft. Dear Hera, your all living in some kind of bubble and think that the only witches out there are in the magical world."

"Excuse me," said an adult voice and they all turned to see the teacher standing there. "I believe that we have a lesson to get to."

Cassandra glared at the students and found a seat, as far away from bubble students as possible.