Disclaimer: I do not own either the BtVS, Cardcaptors and Harry Potter series.

Chapter 1

Clow Reed knew that his death was coming as he was getting old, no magic could beat death. He looked into the future and witnessed two descendents: Sakura Kinomoto and one descendent he had just found out about; Xander Harris, he was going to be born on the Hellmouth. Sakura would survive without the Clow cards but Xander could use the Clow cards for great good or evil on the Hellmouth, he beckoned Keroberos to come to him and the Clow cards that would be needed on the Hellmouth.

"My lord, you summoned me?" Keroberos asked.

"Yes," Clow said, "I have a task for you; I want you to protect the Clow cards."

"And what of Yue?" Keroberos asked.

"He will join you in time Keroberos," Clow Reed said, "but for now it is time for you to sleep."

Keroberos felt a gentle darkness fall over him and lull him to sleep, he heard Clow Reed's voice say, "Be careful on the Hellmouth."

Clow Reed than called one of his oldest human friends and said, "Salazar, I heard things were going badly with you and the other founders and I thank you for your coming here amidst your own troubles."

Salazar Slytherin smiled and said, "Clow, I would have come even if the wizardling world was hunting me down."

Clow smiled gently and passed Salazar a book and a key and said, "These must be given to my descendent; Xander Harris, on this date without fail. You will find him in what will be called Sunnydale."

Salazar looked at the book and key and realized that it was the Clow cards, he whispered, "You would trust me with these?"

"More than I would trust Godric or Rowena that's for sure," Clow said as he got up to make a cup of tea for himself and Salazar.

"But isn't Godric's ideals more in line with your own?" Salazar laughed.

"No, Godric is a good man but his own light blinds him," Clow said with a gentle tone.

Salazar nodded and drank the bitter tea that Clow had poured for him. 'Whoever this Xander Harris guy is, he was in for some interesting times,' he thought and then said, "Clow, will Xander be a wizard?"

"He will be a wizard and before you ask it will be his choice rather or not he goes to Hogwarts," Clow said.

Salazar left with the book and key, Clow Reed smiled; he trusted Salazar enough that he would fulfill his request and walked into his small library content in knowing that his life was good and he wished good lives for all of his descendents.

Sunnydale; several hundred years later and a few days after the Master's failed attempt to escape at the Harvest, Xander was still feeling extremely depressed about Jesse's death, he forced himself to smile and joke but it was twisting him inside. He was going home when he saw a robed man approach him and ask, "Excuse me, are you Xander Harris?"

"Uhh no," Xander said as he backed away nervously; this guy was creeping him out.

The robed man looked at Xander and said, "You are Xander Harris, I have something for you," as he pulled something out of his robe, Xander saw a book on the sidewalk and the robed man was gone.

Xander crept towards the book and picked it up, he looked at the back and saw an intricate design of a moon and sun on the back and on the front; a winged catlike thing along with a lock and on its side, in gold lettering, it spelled out the Clow Book.

Xander thought, Hmm, maybe Giles could help me understand what it is."

The next day Xander went to the library and saw Giles trying to teach Buffy how to fight, "Hey Giles," Xander called out, "I need some help with something, when you got the time."

Giles looked up and said, "I can help you right now actually," as he walked over to where Xander was standing. Xander held the Clow book so Giles could see it and said, "Sorry Xander, I wish I could help you but I haven't heard of this book before," and handed the book back to Xander.

Xander sighed, looked at the book and said, "Thanks anyways," and walked out of the library to try to study the book at home and read it.

Meanwhile, Giles had been intrigued by the name, the name Clow sounded kind of familiar. He decided to look in one of his older books, as he read through the book he found the name,

"Ah," Giles said, "here it is. Clow Reed: an extremely powerful magician, he was half Chinese and half English and combined the two magical systems to create a group of magical cards that were supposedly sealed in a book called the Clow book."

"Good lord!!!" Giles exclaimed, "Does that mean Xander has that damned book!!?"

Giles continued on reading the book and realized that the Watchers council had little knowledge on Clow Reed, including reports on his powers or even his existence. So Giles thought, 'Maybe, just luckily, Xander had a forgery which was most likely as there was too much conflicting reports.'

Later that day, Xander was at home when he saw the book unlock itself and inside Xander saw a deck of cards. He picked the top card which showed a yellowish fairy like creature called: 'The Windy.' As Xander said that name out loud a massive wind blew upwards the cards blew out the window and flew into different directions. Xander just had a dumbfounded look on his face as he saw a small orange and white creature appear out of the book.

"Hidey ho, hidey ho. Thanks for waking me up man," he said and as he looked around and saw the mess, he said, "Awww, no way!!! Did you release the Clow cards?"

Xander just nodded with a dumbfounded look and screamed, "What the hell are you!!?" as he grabbed something blunt to hit it.

"WHOA, WHOA, what are you going to do with that thing!!?" the creature screamed in fear.

"Well, I am just going to smash it over the head of the cute, fuzzy demon," Xander said as he tried to crush the creature.

"I am NOT a demon, I am Keroberos; the guardian beast and you now have to catch those cards you just set free."

Those words snapped Xander out of his shock and he screamed, "What do you mean I have to catch them!!"

"Because you set them free," Keroberos screamed back.

Xander glared at the little creature and said, "Make me!"

Keroberos looked at Xander and grinned at him, he said, "You don't want me to make you, trust me."

"Look small stuff, I doubt you can make me," Xander said as he was about to walk away.

Keroberos snorted and said, "Show some responsibility for your actions.

Xander froze and glared at Keroberos and said, "If you're the guardian beast then you get them."

"Because only the one who freed them can catch them," Keroberos muttered under his breath.

Xander growled, "And how do I catch them then?"

Keroberos looked at the key, touched it and it turned into a staff.

Kerberos looked puzzled and said, "Hmm, it's usually a wand not a staff."

"Thank god!!!" Xander said, "I will so NOT be waving a wand around if I agree to do this."

Keroberos thought, 'How the hell did he unlock the book? It might have been destiny or just a horrible happenstance.' He said, "Please dude, I really need your help."

Xander looked at the little orange and white winged creature, which looked pathetic by this time, and said, "Alright, I'll help."

"Thanks dude," Keroberos screamed happily as he hugged Xander's face and said, "Soon you and I are going to be the best of friends, oh and hey, what's your name?"

"Uhh, it's Xander."

"Well, you can call me Kero; it's a short version of my name."

Xander sighed; it was going to be a weird time for him.

TBC

A/N: Okay I wanted to try a cardcaptor Btvs crossover because I have only seen one of those in the website and hey what cards should Xander find first if you have seen the series or the manga before give your input and also it's been sometime since I have seen the series or read the manga so forgive me for any errors I may have made thanks

What kind of chaos should the released cards should bring to Sunnydale?

What romantic pairings should there be between BtVS, Cardcaptors and Harry Potter if I do so? Please note that I am a slash writer but any ideas are welcome.

A/N2: Not sure what other crossovers will be included in this story, any ideas?

Please rate and review