I do not own any of Assassins Creed or Zero no Tsukaima characters. Assassins Creed belongs to Ubisoft while Zero no Tsukaima belongs to Noboru Yamaguchi.

Second story! This was another idea I thought some time. Why I did this? Well, I've seen so many stories about Louise or Henrietta in a crossover, but not so many with Tiffa. So I'll try if I can do this ok. If you see similarities with the anime is because I'll base this fic in the 3rd and possibly 4th season of the anime itself.

If you see a wrong spelling or an incoherent sentence, don't hesitate to tell me. Thanks beforehand!

Ch. 1 Old eagle's sorrow

Masyaf, year 1192. A year passed since the incident where the villagers were brainwashed by the Master assassin, Al-Mualim. However, a single young assassin ruined his plans and killed him before things got worse. His name was Altair Ibn-La'Ahad. After the whole mess, this man became the new master. Now the assassins followed his orders. Although, something was bothering Altair…

It was a very strange situation. Altair never got along too well with his parents, Al-Mualim was the only one who was something like a father for him. It was hard, even for a strong man like him. Being forced to kill your only 'like-father' because his madness and his longing for power and peace through the mind control… Altair was always very serious and focused in his goals. He was very arrogant and hurried. The only thing he could do is please his master orders and kill all the members of the Templar Order.

Although, when he was forced to start again as a novice, he learnt to think for himself and being more humble. That's when he realized it. His master, his father, was as corrupted as his victims. Not only that; his mentor tried to kill him when Al-Mualim didn't need him anymore.

Too many spears in his heart to bear it up…

He was sitting behind his bench inside his study. He was holding his head with his hands and sighing repeatedly. He heard the door opening and raised up his voice not looking at the door "Who's it?" He said in an arabic accent.

"Good morning, master" Said the assassin bowing a little to Altair.

"Ah, Malik… What do you want?" Altair said looking at him finally.

"New members have joined the Order. We're going to initiate them at the top of the tower and we need the master there"

Altair sighed tiredly "Alright. I'll be there in a minute…" He said coldly.

"Of course, master" Malik said bowing and exiting the study. Altair sighed again while looking at his left ring finger. His 'missing' left ring finger, actually.

(Perhaps you were right, Al-Mualim… I'm starting to regret this…) He thought remembering those heartwarming yet distant words his 'father' said to him a couple of years ago…

Flashback

"Altair… I have seen you becoming from a boy to a man in so short of time, it fills me with as much sadness as pride… You fit your father's shoes as if they have been tailored to your feet" The old Al-Mualim said resting a hand in Altair's shoulder.

"I did not know him well as a father" Altair conceded "He was an Assassin above all"

"You too were born into this Order. Do you regret it?"

"How can I regret the only life I've ever known?"

"You may find a way, in time. And it will be up to you to choose the path you prefer…"

Flashback End

Since Al-Mualim's death, Altair always thought about those words, because now, it has sense. He was an assassin since he was born, he never knew about another type of life. But… he started to regret it…

"Well… I better go…" He said putting on his hood and standing up from his chair. Minutes later, he was at the top of the tower of the castle. All the novice assassins were standing on the piece of wood sticking out the tower. They were ready to jump to the void; it was the initiation into the Order, after all: The leap of faith.

The first one jumped into the canyon, but he landed safely on a bunch of stalks, which cushioned his fall.

The second one did the same. He also landed without any harm. The problem surged when the third one was about to jump. It was clear that he was very scared to jump.

Suddenly, a strong gust started to push dangerously the assassin. He also started to lose his balance. Altair knew how fatal a wrong jump could be if you land on the stalks in the wrong position. So he ran to the assassin and pushed him inside in time.

However, he tripped in the process. This made him to fall from the tower, and he wasn't in the correct position. On top of that, there was no time to adopt the right position before reaching the floor first. (So, this is the end… uh?) Altair thought. He surprisingly accepted this fact. He was about to die…

Perhaps was better like this… Maybe this was his punishment for his actions…

-Meanwhile. Halkeginia-

In another dimension, where magic and mythical creatures coexisted in a single world, there was an academy in the middle of a landscape. It looked like a grand castle. This is where nobles study all types of elemental magic; fire, water, earth or wind.

Months ago, a war happened between the countries of this continent. A single boy battled Albion, the offensive country. He died in the battle, but he eventually was revived.

This boy was Saito Hiraga. He was a regular boy of Earth until he was summoned by a girl of this dimension. Her name was Louise. They became so close to each other since Saito's arrive to Halkeginia. They were so close that they got involved in a romantic relationship.

They were at Louise's room inside the academy that morning. Saito was on top of Louise on her bed "Louise…" He said sweetly to her. Louise looked at her side, blushing a bit.

"Do-Don't look at me so much, idiot…" She said embarrassed "I know you came back when I thought you wouldn't… but you're still my familiar…"

"I don't care, Louise. You don't know how happy I am for being with you again" The boy said sweetly kissing her in the cheek.

"Saito…" The pink haired mage whispered to her familiar. They started to approach their lips… until the door was opened violently.

"Good morning!" A girl dressed like a maid said interrupting the romantic scene.

"Si-Siesta!" Saito exclaimed blushing and falling down the bed. He stroked the back of his head by the pain. Louise looked at the maid frowning.

"What are you doing here, cow girl?!" She said madly.

"Hmph. I already told you I'll fight for the love of Saito, even if he's 'unofficially' married with you" Siesta said with her hands in her hips "And I wanted to tell you that the summoning will take place immediately"

"The summoning?" Saito asked while standing up.

"Yeah. Don't you remember? Tiffa's going to summon up her familiar this morning" The maid said (Oh, right… Tiffa transferred to this academy a couple of days ago… I'll never thank her enough times for resurrect me) Saito thought.

Meanwhile, in another room of the academy, a blonde girl was looking at her reflection in the mirror. She was holding a wand near her chest while she was thinking carefully in all of this (So… today I'm going to have my own familiar… I'm so nervous…)

She put on her hat. She knew why she should do it, why she MUST to wear it; she would be in problems without it (I wonder what type of familiar I will summon up… It would be as brave and kind as Saito…?) She said blushing when she thought about the boy. She breathed deeply before exiting her room (I hope this turns out well…) She thought to herself.

Minutes later, she was in the academy grounds surrounded by all of the other students. A woman stepped forward the blonde girl.

"Tiffania Westwood, you can start with your spell when you want" Miss Chevreuse said smiling at the girl. Tiffa nodded with a nervous smile. She looked around just to see all of the students looking at her with intrigue.

Well… actually, most of the guys were looking at her bust size with a droll in their mouths…

Tiffa decided not to make them wait more. She closed her eyes and raised up her wand in the air. She started to whisper a spell in a strange arcane language. The time was passing so slowly that it looked like hours, or even days.

Finally, she pointed her wand in front of her with the last word of the spell. Suddenly, the spell exploded in the middle of the circle made by the students and the dust was floating around. The students coughed a bit but they tried to see what Tiffa summoned up.

All of them opened wide their eyes when they saw it. There was a young man lying on the floor. He was wearing a long white outfit and several steel weapons.

Saito looked at him surprised "A human?!"

Louise was also surprised "But… But the only ones who have human familiars are the Void Mages! Does that mean…"

"Tiffa is a Void Mage too?" Saito finished with a whisper.

Tiffa bend down and touched the man in his shoulder "Are you alright mister?" She asked innocently.

"So… Another human familiar, huh? This can get interesting" Guiche said looking at the foreign with curiosity.

"Do you recognize him, Saito?" Montmorency asked the boy.

"Not really… In fact, his clothes seem… weird…" Saito said while scratching his chin and looking at the lying man.

"What are you talking about, dear?" Kirche asked.

"Because… they seem too old. He's like those weird cosplayers…"

"Ugh…" The mysterious man started to wake up. Tiffa moved away from the man, just in case he could get violent. He sat up and stroked his head.

"Ugh… What a horrible headache…" He said. However, all of the students raised an eyebrow in confusion. They didn't seem to understand him.

"Do you know what he said, Saito? You're from Earth too so…" Kirche said.

"Actually, no. I didn't understand him; his language was so familiar though. I think it is… Arabic?" Saito said. But no one knew anything about that.

Altair looked at his surroundings confused. He stood up slowly "Who are you? Where am I?" He asked. But it was futile, no one understood him.

"Well, Miss Westwood. You must finish the contract with your familiar" Miss Chevreuse said to the blonde girl. Tiffa nodded and looked to Altair shyly.

"I-I'm sorry for my daring…" She said to her new familiar, feeling sorry.

"What?" Altair said confused. He doesn't know what they were saying either. Suddenly, the blonde kissed the man in the lips. Altair opened wide his eyes. He was about to die just minutes ago; suddenly, he appears in a strange world where nobody speaks his language and now he's kissed by this girl for nothing?!

The other students looked at the new familiar with jealous. After all, he was being kissed by the most 'attributed' one of the academy "Why did you…?!" He started to ask madly. Suddenly, a huge pain in his chest interrupted him. He held his chest with a hand while he screamed in pure pain. He even fell onto his knees.

Tiffa looked at him with a sad look. She was so sad about the pain of her familiar, but this was part of the contract after all. Altair fell asleep from the pain…

(Where I ended up…? What's going on…? Am I dreaming...? Or it's just a deliration of my mind before my death…?) Altair thought before passing out completely…

To be continue…

First chapter finished up! If I tell you the truth, I'm not sure if this story would work up. If you want me to continue it, let me know it with the reviews and I'll do my best to make it! And if you have ideas, you can leave me them in the reviews or in a PM!

And about the characters… If you watched the 'Zero no Tsukaima' anime you'll know them easily. But if you didn't, I'm so sorry not to provide you with a physical description and their character. They are so many characters that the chapters can get too boring and long. So if you want a description of the characters, Google is your friend.

Leave me reviews and see you next chapter!