Chapter 1

Author's Note: I do not own Fate Stay Night or A Song of Ice and Fire/Game of Thrones. Also, this premise has been also used by Sword of Ice and Fire by hcdevid and A Pendragon in the North by Spidey-phd.

Chapter 1 The Dragon Reborn

Rhaenys Targaryen sighed. Her new grandfather was an improvement over the one who sent her to die in the Holy Grail War, but he was also insane. "At least he is too weak minded to resist my magecraft." She was not intimidated by his mood swings. She used to be the master of Berserker after all, she kept that juggernaut of madness under her thrall with her power.

"… this Dornishwoman…" Aerys hissed out the word with scorn. Rhaenys idly wondered if he had the wits to recall he descends from Myriah Martell and Dyanna Dayne. "… passing on her defective genes and spawning a red eyed…"

Rhaenys watched her mother attempting to not cringe or show any fear to the Mad King. "How dare this weakling attempt to make MY mama cry." Rhaenys decided speak up and work some of her magic.

"Are you saying that the dragon should be ashamed to be different from ordinary men?" Rhaenys asked. Aerys stopped his ranting and glared at his granddaughter. Rhaenys focused prana and send a spell to Aerys. "If anything, my ruby eyes should be taken as proof that we are different blood than the men who serve us." Rhaenys smiled. "My mental compulsion of Grandfather is ludicrously easy, controlling Berserker took much more prana than this feeble-minded twit." Unfortunately, she was not able to completely dominate the madman's mind. Her new dragon core that reincarnation provided her gives her access to large amount of units of prana that she can release all once, but her young body is not as capable of using that safely yet. "I do not have much knowledge of hypnosis magecraft either." Rhaenys mused. While her wishcasting sorcery trait allows her to get an effect without knowing the exact specifics of the spellcasting involved, affecting the mind using a brute force method carelessly would likely completely obliterate Aerys mind. While she would not mind using her magic to provide Aerys an "accident" she still needed to account for the fact that there are schemers in the court are attempting to disinherit her father and get her uncle on the throne to gain a regency, if Aerys had an accident now then her mother would be scapegoated and then…

"Begone from my presence." Aerys sneered.

Elia grabbed her daughter's hand and led her away from her goodfather as fast as she could, without looking like she was fleeing. "Rhaenys, you should not be so bold with the king, he is easily angered." Elia told her daughter.

"But mama, he is going to put a stop to all those mean nobles saying mean things a about my eyes." Rhaenys said, turning on her charm. Judging by the expression on her mother's face, her cute act is not enough to reassure her. Not that Rhaenys blames her, her mother lived in fear of Grandfather's mercurial moods, without the reassurance of powerful magecraft that would defend her.

Her crimson eyes were a source of pride for her. They were the eyes of Illya's mother Irisviel. "Illyasviel von Einzbern was a sad girl who had a wretched existance. I am Rhaenys Targaryen, now the strongest magus in this dimension." Rhaenys told herself. The former homunculus girl is attempting to leave behind her depressing former existence and excite herself with the thought of being royalty. Even with that she is still looking forward to the reincarnation of her brother. "I hope he forgives me for using the grail." Rhaenys thought. A few years living like a princess is a definite improvement over the cold days living as the lesser grail and weapon of the Einzberns. But there is still something vital missing and Rhaenys can't help but wait for impatiently.

"When are we going to Harrenhal?" Rhaenys asked her mother.

Elia smiled. "Soon sweetling, are you looking forward to your father and Ser Arthur displaying their skills to the realm." Rhaenys watched her mother smile at the thought of leaving the Red Keep for a while. She couldn't blame her. Elia Martell was held in disdain for only giving birth to a daughter and not providing a Prince Rhaegar a "proper" heir. And everyone would agree that being away from Aerys Targaryen for any period of time is a welcome blessing.

"Yes mama." Rhaenys smiled at her new mother. "Having an actual family again is amazing, but when is Shirou going to be reborn again?" Rhaenys wondered. She frowned at the reminder of the absence of her family. "Hopefully soon." she thought.

"It's time for bed." Elia told her daughter. Rhaenys sighed and agreed with her mother that she wanted to sleep. Elia looked startled at her unexpected acceptance. Normally Rhaenys disagreed with her mother and father for the sake of being difficult. It isn't as if there was much ways for her to amuse herself. Elia frowned and looked concerned.

"Sweetling, you know you can always depend on your father and I to protect you." Elia told her daughter.

"I know, I just want to go to sleep." Rhaenys said. "Great, she noticed I am sad." Rhaenys thinks. While she wants her brother back as soon as possible, she was not going to tell her mother to get pregnant again as fast as she can. "I almost killed her at birth and the people at court harass her enough giving birth to "Rhaenyra Targaryen"."

"Honestly this new body of mine is amazing." Rhaenys mused. Her old homunculus body had a large prana output, but was physically stunted at a prepubescent state. Her dragon core can potentially provide even more prana than anything Illyasviel could use.

"And I don't even have any physical weaknesses that plagued me before." Rhaenys thought. While her body would never reach Leysritt's physical capabilities, it wouldn't be the frail thing it was before. "Maybe with a more womanly body Shirou won't look twice at any other inferior tart." Rhaenys smirked. Her wishcasting ability allowed Rhaenys to craft her body to identical to Juzteaze Lizrich von Einzbern. "She was beautiful and flawless, the pinnacle of the Einzbern homunculi." Rhaenys thought. Rhaenys hoped that with her dragon core she would grow even more powerful than the Archmagus.

"I hope that papa will give me a wyvern egg soon." Rhaenys thought. She snorted at what the Targaryens called dragons and the pinnacle of beasts, the magi of her old world would call wyverns of the monstrous class of magical beasts. Dragons are the pinnacle of the Phantasmal Beasts from her world, and the most powerful wyvern she knows of did not live long enough to approach that level. Balerion the Black Dread is certainly not to be taken lightly, but Heroic Spirits from legend dealt with creatures on a far higher level than it.

"I am certain that with my dragon blood and prana output I shouldn't have any issues getting it to hatch." While Rhaenys would have preferred to have what she would call a dragon, she would be willing to settle for a wyvern. It would certainly give Rhaenys a lot of prestige in this world. "If I have a wyvern then these nobles will have to see my superiority over that weakling Viserys."

The grail provided Rhaenys many boons, her old capabilities and the knowledge of the Einzbern homunculi the were her predecessors, but the strongest of those blessings is her dragon blood. Saber was gifted with dragon blood by the sorcerer Merlin in her legend. It is common knowledge in the magi community that this provided Saber immense potential in the field of magecraft that she squandered. Saber didn't even wield all the prana she could have potentially used in life. Saber's corruption by the grail certainly showed how much power she was holding back. Rhaenys had no intention of letting her powerful dragon core, wishcasting ability and homunculi knowledge go to waste. "Now if only I get my hands on an egg."

Given the tragedy of Summerhall Queen Rhaella would not budge on her decision to not give her granddaughter a "dragon" egg. Prince Rhaegar was born in the tragedy and agreed that dragon eggs should not be given to children and risk another accident occurring. Rhaenys would not admit out loud, but this concern for her safety touched her heart and brought tears to her eyes. She distracted herself by complaining about being smothered. "Honestly, I was the master of Berserker and am a powerful magus, I am certain that I will be fine." Not that anyone knew that the sweet "delicate" princess was a force to be reckoned with.

Then she sighed and contemplated the worries that she desperately tried to ignore before.

"I wonder how Angra Mainyu will twist my wish to make it as horrific as possible," Rhaenys thought. "As long as Shirou and I are together, I can deal with whatever it throws at me."

"Don't keep me waiting too long, onni-chan," Rhaenys thought.

"Well, I can certainly see where this is going." Rhaenys thought as she watched her father put a crown of winter roses on some brown haired girl. Illyasviel von Einzbern was conditioned to despise Kiritsugu Emiya for abandoning the Holy Grail War and leaving her behind just to raise some common whelp. While Rhaenys was not happy at the insult to her mother, even she could not help but yearn for the thought of being with her brother again.

Illya was deadset on killing the boy who stole her father away from her, but could not help but be swayed but his noble character and dedication for his loved ones. "I will not allow Angra Mainyu to tear me apart from my brother."

Rhaenys sighed and hoped that this situation will resolve itself soon enough. "Are you almost back to me Shirou?"

AU I know this is going to be a controversial decision but Elia only has one child, Rhaenys, and Aegon doesn't exist in this world. I am not sure if he is a fraud or not, but given the fact that Illya hated Shirou at first for "stealing" away Kiritsugu from her and Irisviel I feel that it would be fitting that Rhaenys would have a brother who "steals" away Rhaegar from her and Elia.