Hey everyone since I finished this earlier than expected I will be posting the first chapter along with the prologue as an early holiday gift for everyone. Now remember this story is big in the AU department so if you do not like those please note I did warn you. Also there will be elements of the Web series RWBY in place mainly weapons and Dust that might change in the future but just be warned of that. Now most people are asking me in the sneak peak I gave if this will be a Harry/Buffy story and I can tell you that the only relationship that will be between them is that of parents for Dawn. I have not settled final couples so please do not ask. Now for the only disclaimer for the story. Unless it's OC I don't own it! With that out of the way here...we...go.

Oh and shout out to BookNinja93 for the title thanks a lot for the help.

The Key to a New Dawn

Prologue

A groan was heard as Buffy Summers stretched out after waking from a full nights' sleep. She felt a smile on her face as she felt her bed partner's arms assuring her that he spent the entire night as the big spoon to her little spoon.

She opened her eyes and almost chuckled at the sight of a familiar white sheathed sword and a bright red box resting in the chair next to the windows chair. Both were weapons her partner used in battle against evil. Much like herself he was chosen by fate to fight against evil she as a Vampire Slayer he as a Battle Mage. She chuckled a little when she felt his lips kiss the back of her neck.

"That tickles." Her comment gained a chuckle from the boy with her before she turned to look into his green eyes. Those plus his always messy black hair, and scar above his right eyebrow shaped like a bolt of lightning were the most distinguished traits of his.

"Morning." Harry Potter said to her making Buffy give a small smile as she kissed him before the pair separated to perform their usual routines. This was a common practice between them. You see Buffy had come to LA looking to get away from any and all reminders of her lost love Angel the vampire with a soul. After she had been forced to stab him through with a sword and send him to a Hell dimension she had felt broken.

That combined with the loss of her home, her mother, and her friends not being able to understand she had left without telling anyone. Originally the plan had been for her to come down here and try to live her life without any part of the Supernatural being a part of it.

She had even planned to use her middle name to help pull off the illusion.

That plan went out the window when she stumbled upon a teen fighting a group of over ten vampires alone using a white shield and a bright blade that seemed to dust vampires without decapitating them. After rushing forward when a vampire was poised to ambush the fighter from behind Buffy once more found herself battling the forces of evil.

After the last vampire has been reduced to dust the fighter had pushed the blade into a slot atop his shield. Buffy was shocked when it folded in on itself turning into a sheath.

After buying her dinner Harry told her his story. Over in the UK Harry was part of a hidden community known as the Wizarding world. They were a group of magical beings that used wands and had internal magical cores instead of using the power that comes from the Earth like Wiccans. Unfortunately they were also incredibly backwards most stuck within the Victorian era.

A few like Harry trained to become Battle Mages which were basically the ones who actually used their magic for more than just frivolous selfishness. His Godfather had been the one to help him and three friends train to become ready for battle. His sword as well as another weapon that he kept hidden was enchanted and escribed to kill most evil things like vampires.

Both weapons were actually inheritance from his parents with the sword belonging to his fathers' family for generations, and the box something his mother created herself.

As the two talked they realized that they actually shared quite the bit in common. Both chosen by fate to battle evil although his was focused on just one evil in particular. Both had a desire for a normal life. Both also hated the idea of losing more people than they already had. He was there to try and get over the loss of his Godfather who had been killed by his deranged cousin during a raid against the evil group called Death Eaters.

The pair hadn't intended to bring about a physical relationship until they raided a dark witch's base and were dusted by a pink substance. The substance was a powdered form of a lust potion that the witch planned to use on humans that had wronged her.

The dust would've made them very popular with many different species of demons that…well let's just say they wouldn't have stopped once it started. The dust didn't fully hit them until they returned to the place Harry was renting for the summer and much like demons they didn't stop until it burned completely out of their system.

The morning after had been awkward for them both, however after realizing that it had helped them both relax and even had a full nights' sleep they continued without a care. Both knew they weren't looking for more from those nights. In honestly they cared more about healing than falling in love. Last night had been the pair's way of saying goodbye.

Harry had to return to England and Buffy to Sunnydale. "What time does your bus leave?" Harry asked from the kitchen as he worked on a quick breakfast of eggs bacon and toast. Buffy looked at the clock and saw its red numbers telling her it was just moments before nine in the morning.

"Eleven." She said before grabbing her clothing for the day and headed into the bathroom for a shower. After eating the pair headed to the bus stop where Harry would grab the shuttle to the airport and Buffy would head towards Sunnydale.

"Don't say goodbye." Harry said to her making her blink at him. "Goodbye is only said if there is no chance of ever seeing someone again." He explained making her smile at him slightly.

"Can I say 'So long'?" She asked making him return the smile and nod. As the bus arrived Buffy and Harry looked at one another in the eyes before they kissed one last time and separated. Harry stood there watching the bus leave a tear running down his face before he rubbed it away.

Likewise Buffy rubbed away the salty stinging liquid before taking a deep breath to balance herself out.

While they hadn't been looking for something deep the pair had come to care about one another to a point. The tears were in fact a result of the idea that this may have been the last time they saw one another with their destinies so dangerous the pair knew that any day could be their last.

What neither of them knew is that somewhere in the mountains of the Himalayas an order of monks realized that now was the best time to bring about the plan to protect a sacred icon.

An icon known simply as the Key. They had gathered the blood of the Slayer known as Buffy Summers and the Battle Mage Harry Potter to cast a spell that would make the Key take human form. The witch they had gone after had been supplied by the monks to manipulate the couple together.

Just as they had subtly manipulated Harry into coming to LA during his time of grief. Now as the bus carrying Buffy left a hidden monk dressed as an everyday business man on his way to work smiled as he lowered a gold orb.

The orb had allowed him to see the subtle green glow around her womb telling him that the spell had been successful and the Key would now just be with the Slayer…but born of her. They hated having to put the responsibilities of Teenage parenthood upon the two champions but it was the only way they could think to explain the bonds between each.

After all Mage Potter had ways to detect others of his blood line. If he was suddenly contacted by Gringotts telling him that he had a daughter who was close to him in age questions would come up and the Key would be exposed.

It was better that the Key be born naturally into this world instead of their original emergency plan of creating the Key with memories and filled the heads of their entire world with the same memories.

Plus this plan didn't come with the high risk of exposing one to sickness from the Key's great power. The Monk slunk back when he witnessed Potter getting on the airport shuttle knowing his work was done and now the guardians where on their own. As he left the monk couldn't help but smirk at the idea of what would happen to any Evil that dared attack the family of the Key.

Chapter One

Buffy Summers hummed as she rocked in the rocking chair enjoying a little down time. She hissed slightly at the feeling of her new born daughter suckling from her breast. "Geez you would have to inherit my appetite wouldn't you?" She asked looking down at the dark haired babe. Dawn Lillian Summers-Potter was only two weeks old weighting at 8lbs 9ounces and 20 inches long.

After she felt her daughter stop off her feeding she smiled as she moved her and fixed her maternity bra and shirt. Once finished she grabbed a rag and placed it on her shoulder and started to gently rub and pat Dawn's back.

After a moment she heard a familiar burp causing her to smile. "There we are. All better now?" She asked as she pulled her daughter back to look at her dull green eyes. Her daughter gave her a smile before Buffy brought her in close for snuggles.

"You know I never thought I would get the chance to do something like this." She said to the baby. "Before I found out about you I never knew just how much I want to one day become a mom and have something normal like this." Dawn cooed slightly while Buffy used her finger to play with her baby's fist. Buffy thought back to the moment when she returned home and decided to visit her mother.

She was surprised to see her mother's car when she arrived at 1630 Revello Drive, but took it as a sign that this was the correct path. When her mom opened the door and saw her Joyce at first was shocked before she hugged her daughter close apologizing for the way she treated her when they had last seen one another.

True they did have a fight about that last confrontation but luckily it seemed that the fight was all both of them needed to air out their worries before they were fine again. Buffy spent the rest of the day talking with her mom.

Joyce was shocked to hear how she spent most of the summer, but she couldn't help feeling thankful to the young man that her daughter refused to name for helping to heal her daughter. When she asked why Buffy kept his identity hidden her daughter only said this.

"His name is Harry. I can't tell you more because that's his story to tell. But I can tell you he's human, he's a good guy, and he helped me a lot this summer." While she didn't fully like the idea she let it go. That night Joyce accepted Buffy leaving to find her friends thinking she had an idea of where they were.

As luck would have it she was right when she found them in one of Sunnydale's many graveyards trying to take her place. She handled the vampires quickly then said hello. Of course it was awkward for a couple weeks but after they handled a mess that involved her mom accidently buying a mask that would bring the dead back to life they got passed their issues.

Her friends and Giles knew what happened while she was gone but like with Joyce she kept most of Harry a secret.

It wasn't until the week before Faith the Slayer that was called with Kendra's death arrived that things changed. After three days of throwing up for no apparent reason Joyce forced Buffy to the doctor. It was there that she realized her period was late normally she wouldn't think about it since the stress of Slaying kept her biological clock off.

However when the doctor confirmed that she was in fact pregnant she had been shocked beyond belief. Joyce had been shocked too but instead of getting angry or disappointed in her daughter she just took her home and called everyone.

Once they had gathered in the living room Buffy told them the news. Giles had dropped his cup of tea, Xander had been stunned silent, Cordelia just looked at her without changing her expression, Oz just raised an eyebrow, and Willow after a moment squalled and rushed towards her. After the initial noise she called for silence.

"Now before anything else is brought up know this. I'm keeping this baby." She said narrowing her eyes at Giles who just nodded.

"I wouldn't suggest otherwise Buffy." She relaxed knowing that Giles wasn't going to suggest she get an abortion.

"Well you realize this means you can't fulfill your duties of being the Slayer correct?" He asked making her sigh but nod.

"I know. Think the Watchers Council will send Kendra's replacement to take the reins for a while?" Giles had nodded and moved to Joyce's phone telling her he would cover the long distance charge.

"So does this mean you're going to tell us about Daddy dearest?" Xander asked after a moment.

Buffy sighed at the question her friends had been curious about Harry ever since she told them that she had a summer fling. However she refused to tell them anything beyond his name, age, and the fact that he was a human from the UK. She knew it bothered the lot of them but she didn't care.

Harry's life story was his to tell. Not to mention the magical world of the UK was completely secret like James Bond 007 kind of secret that could get peoples' mind wiped or killed. Harry had only told her because as the Slayer she was technically already a part of the supernatural world. Loopholes got to love them.

"I've already told you about him Xander. Drop it." She said but she was surprised when Oz was the one to speak next.

The werewolf of the group barely spoke except when he felt it was needed or he felt like it. "That is up to you Buffy. But are you going to tell him about the baby?" He asked causing the Slayer to sigh as she looked away. "I don't about Harry, but if it was me. I'd want to know."

Oz's words had bothered her for a while. A part of her felt that if she told Harry he wouldn't be focused on Voldemort and his Death Eaters and might get himself killed. But she was also afraid that something else would happen if she told him. While in her heart she knew Harry wouldn't abandon her and Dawn or try to take Dawn away from her. Her head kept filling doubts that kept her from writing to him.

Harry told her he would write when his war was over and if she hadn't heard from him in two years she was to assume he was dead. A full year hadn't even passed by yet, but she was still worried about him. As she looked down into her daughters' eyes she knew that one day they would turn to the same Emerald green as her father and his mother before him.

She didn't know if she could handle knowing that her little girl was all that might be left of Harry on this world. Nor if that was the fact did she look forward to the idea of having to explain to her daughter why her Daddy wasn't around.

A week after that uncomfortable meeting Faith and her Watcher Dianna arrived. Dianna or Di as Faith called her reminded them of Giles in the fact that she was a walking knowledge bowl of the supernatural, she wore tweed, and wore glasses when reading.

Other than that she was more relaxed about active duty and like Giles didn't force the Watchers ways upon Faith like the Watchers wanted him to do with Buffy. Faith was…different to say the least.

Unlike Kendra who was almost always all business Faith knew how to have fun. Sometimes though Buffy wished she wasn't so open about her past sex deeds and had less stories about her being naked to take down a demon.

As luck would have it thanks to the call from Giles the pair had been spared a bad ordeal. Turned out a big old Vampire by the name of Kakistoss had taken an interest in Faith. From the books they learned that he had a tendency to go after the ones his victims loved first forcing them to watch him torture and maim them till finally destroying his true target.

With help from the Scooby's Faith had been able to stake him before he could harm anyone. That was also Buffy's last slain enemy before she went on maternity leave from Slayer duties. Faith had been shocked to learn that the blond was pregnant having figured Buffy for the type who waited to get married first.

However after a while Faith became a part of the group more so because they showed her just how much they relied upon her to protect the innocent. Faith showed how much she actually cared for the first time when Snyder the creep vice-principal of the school had tried once more to expel Buffy when he learned she was pregnant.

Faith spent over a month pranking and making his life hell until he finally erased every bad mark, word, and thought from the permeant records of the entire gang…minus the fact that Oz repeated senor year. He was actually kind of proud of that fact.

It was also thanks to the time she spent with Buffy and Dawn that she began to see that there were mothers out there that loved their daughters. Even before the first time Buffy had seen an ultrasound of Dawn she loved her baby.

Faith watched as Buffy nested, cared for, worried, basically went through the full maternal thing and realized that it was a beautiful thing. Faith also slowly lowered her walls with the gang and by the time the Mayor was handled they were completely gone.

Buffy snorted slightly the Mayor had been a big mess but luckily Faith had been able to handle it with help from their friends. Cordelia and Xander's relationship hadn't lasted through the year because she found him in an intimate situation with Willow. That had also caused Oz and Willow to break up and realize it was probably best it stayed that way. However that hadn't been the biggest drama of the year.

Turns out the PTB (Powers That Be) weren't done with Angel and had brought him back from the Hell Dimension Buffy had sent him to. The Vampire was re-ensouled but feral and hadn't liked the sight or smell of a pregnant Buffy. The first time they all saw him he had attacked Buffy catching them by surprise after dealing with an expert werewolf hunter.

Shockingly…his attack failed. When Buffy had turned her body to try and protect Dawn from the wild attack a green energy made shield surrounded her body. It pushed the crazed Vampire back making him growl as he tried to claw at it again and again before running off when it was clear he was getting nowhere. When it was clear she was no longer in danger the shield returned to her body…her womb in fact.

Buffy knew right there and then that her daughter had inherited something from her father. His magic. True she didn't tell her friends the truth about how it happened she just played on her own surprise that it did. Giles was still looking up ideas on how Dawn made the shield while Dianna theorized that Buffy or Joyce came from a line of Wiccan's.

That night Faith had sat down with Buffy and said that they needed to talk. Buffy sighed and knew she couldn't lie to her sister slayer about Dawn's origins, and thus used the same Loophole Harry had to tell her everything. It felt good to finally be able to tell someone the full truth instead of the half-truths she had been spouting.

"Wow B can't believe you went looking for peace and wound up meeting a man in the same situation as us." Faith had said with a smirk chuckling causing Buffy to laugh with her.

After that encounter Faith did everything in her power to keep Angel away from Buffy and Dawn. They both knew his obsession would cause him to eventually do something that could hurt both Buffy and the baby something neither of them were willing to wait for.

The amount of protectiveness had sparked a few laughs from the group with them teasing Faith about being a second mommy to the baby. Something that Buffy added to when she asked Faith to be Dawn's Godmother to watch over Dawn if anything were to ever happen to her.

Faith had surprised everyone when she was asked that. She cried. Something she never would've done in front of any of them before. The night the Mayor was finished his army of vampire scattered Buffy went into labor. Joyce stayed with her through the entire thing with Faith being there to squeeze her hand. Since they knew Buffy would break Joyce's hand or the bars on the bed.

When little Dawn entered into the world Buffy cried. "She's perfect." She said in a tired voice as she held her daughter for the first time. A head of messy black hair and a pair of dull green eyes. "She has her fathers' hair and eyes." She remembering thinking as Faith gently ran a finger against the newborns cheek.

Now here they were just two weeks later enjoying a moment of peace before the day started with Dawn having her breakfast and some mommy cuddle time. "You know I sometimes wonder what would've happened if I hadn't of met your father. Actually I fear to think what would've happened." Buffy said looking down at the bundle in her arms. Dawn had her eyes closed again breathing evenly now that she was clean and had a full tummy.

"I most likely would still have the idea that a person needs a soul to have feelings, to be good, or other such things. I probably would've tried to make it work with Angel again. God that would've been disastrous. Lucky he finally seems to have gotten the message and left town." She said as she continued to absent mindedly rock back and forth.

"Faith…I don't what would've happened to her. Maybe she would be the same as she is now. Maybe Kokistoss got to her before we met. Maybe the Mayor succeeded in his ploy to recruit her. Either way I'm glad she was able to realize there are people that actually care about her." Buffy said.

True Willow and Xander would always be her best friends but Faith had become like a sister to her and an aunt in all but blood to Dawn. In fact she was Auntie Faith to Dawn but most everyone called her Mama Faith behind her back because of how much she loved the little girl.

Buffy had begun to wonder if the essence that made the Slayer affected the pair of them when it came to children. Sure she noticed that most cases involving children seemed to hit her hardest, but the level of fierce protectiveness from both she and Faith when it came to Dawn was past mama bear status.

Faith Lehane sighed as she sealed an envelope and wrote the name Harry Potter on the front. She just hoped she was doing the right thing. True Buffy had the final say in all things Dawn but she wasn't the only one who technically had that authority.

She knew that this might be pushing the boundaries of her authority as Godmother, but a Father had a right to know about their own children…or the fact that they have one. "Then again if someone is going to give an excuse for why they weren't involved in their lives of their children. 'I didn't know I had children.' Is a pretty good one." Faith thought before sighing.

"Although how the hell am I supposed to get this…?" Her question was interrupted when she heard tapping at the window.

She looked over and saw a snowy owl on the branch next to her window. "Ooookay." She said as she walked over and opened the window before the owl flew inside. Faith looked at the owl before remembering something from Buffy.

"Hedwig?" She asked making the owl nod her head. She remembered the owl from Buffy's information about Harry mainly about him telling her that if he did contact her it would be through a letter via messenger bird. More in fact a snowy owl named Hedwig.

"I don't know how you knew I needed you but I'm not gonna question it." She said before handing the letter out to the bird she snagged it in her beak before opening her wings and leaving the room.

"I just hope Buffy doesn't kill me." She thought before heading out of her room heading towards breakfast.

Hedwig the owl flew through the early morning light of California before heading high into the air and entered into one of the many magical portals that allowed Post Owl's like herself to travel long distances without tiring themselves out. When she left the portal she arrived outside in the late afternoon close to evening light of the same day in London England.

As she flew she knew it was important that she reach the wizard she shared a familiar bond with. As she flew she soon arrived at a familiar house with bushes with dirigible plums outside. If she could roll her eyes she would but when the window opened without prompt she relaxed and flew inside the house of her wizard's friend.

"Ah hello Hedwig." The blond Luna said once she saw her. With a muffled bark Hedwig acknowledged the blond before she reached for the letter and accept the burden.

"I'll make sure Harry gets this." Luna said handing Hedwig a couple bacon flavored owl treats. Hedwig accepted the treats before flying up into the rafters. Luna hummed as she moved off towards the small library on the second floor. She knocked on the door and opened it to see a familiar bushy haired girl at the table working on with her quill moving rapidly along the parchment before her.

"Hermione…tea time." Hermione Granger looked up a small pair of reading glasses on her nose. "Three o'clock already?" She asked looking at the clock on her table.

"I'll be right down Luna." Luna nodded before closing the door. She headed toward the main door and opened it looking towards the garden area when a familiar muscled man with short cropped brown hair. Luna smiled at the almost Zen like attitude he had as he tended to the many different plants.

"Neville!" She called making the man look up at her from his rose bushes.

"Tea time!" Neville Longbottom nodded before he picked up and strapped on two red braces to his forearms just above a set of black fingerless gloves. Luna smiled before she skipped off towards the range in the back. She approached cautiously before passing a ward line and hearing the sounds of sniper fire. She looked up to see Harry Potter with a familiar red rifle aimed down range. Luna waited until Harry fired his last shot as he pulled out a pair of earplugs and rose up from his prone stance. He just ejected the clip when she approached.

"What is it Luna?" He asked making her smile she never knew how he always knew when they approached but it helped a lot.

"It's three o'clock Harry." Harry looked at her making her once more notice the elongated scar upon his face.

Bellatrix Lestrange had left that on him at the final battle of Hogwarts before running away in fear. Voldemort had been dealt with along with most of his forces however some like Bellatrix had been able to get away.

"Already?" He asked as he reached into a pocket on his vest pulling out a pocket watch and opened it. "Huh by the Gods it is. I'll be there in a moment." Luna nodded before turning away and skipping away. She paused for a moment and looked at him.

"Oh by the way Hedwig brought a letter for you." Luna said making Harry nod.

"Can't believe the day passed us by so quickly." Hermione said as she sipped her earl gray tea a personal favorite. Harry was sitting in a small section cleaning his weapon something he did every time he fired it outside of battle.

"Well we are kind of used to only having so much down time Mione." Harry said causing the brainy girl to shrug with a slight nod.

"By the way here's Hedwig's letter for you." Luna said handing Harry the letter after he finished wiping his hands clean. Harry opened the letter and read for a second. Everyone was worried when he gained a looks switched between surprise, confusion, then acceptance before he reached back into the envelope and pulled out a small stack of pictures.

"Harry…?" Harry waved his hand causing the letter to turn into a paper airplane and fly towards Hermione who accepted it while he continued to look at the photographs. Hermione used her magic to unravel the letter and clear it of wrinkles before reading aloud.

Dear H. Potter,

You don't know me but my name is Faith, and I'm the Vampire Slayer that replaced Kendra. The reason I am writing is because something has happened that you need to be told of. First B or Buffy as you know her is alive and well so you are being called to a funeral. About a month after you and B parted ways my Watcher Di was called with a request for the both of us to come to Sunnydale. When we arrived we were told that the reason we were needed was to take over Buffy's duties while she went on maternity leave. Yes you read right maternity leave. Since you were the last to sleep with her I think you know what this means.

Hermione paused here looking up at Harry in surprise along with everyone else as they noticed Harry looking at a photo with tears running down his face. A smile on his face making him look close to his age of seventeen instead of the almost aged look about him since the war.

I have included photos of the baby in question. A little girl named Dawn Lillian Summers-Potter. She is happy healthy and has inherited your magic. I know this because she was somehow able to create a magical shield around her mother and herself from a crazed Vampire named Angel. The only reason Buffy hasn't sent this message or something sooner is because she didn't want to distract you from your own destiny of killing off that moldy guy. However as Dawn's Godmother (Hope that doesn't bother you) I felt you had the full right to know about your little girl. Now that I have what happens next is up to you.

Sincerely,

Faith The Vampire Slayer

P.S.

If you do decide to stay out of their lives do know I will hunt you down and feed you your own dick.

Faith.

"I have a daughter." Harry said making everyone look up at him and see the joy upon his face letting them know her little threat was unneeded. After a moment his expression turned to panic.

"I have a daughter living on the Hellmouth!" That information caused all of them to gain panicked expressions before springing into action.

Hedwig flew down and looked at the photo of a sleeping baby in the arms of a blond teenager. This was her master's owlet and the meant she had more people to watch over.

That's all for now hope you enjoyed it and I look forward to your feed back. R&R Ja Ne