An HOTD Fanfic-Why Not?

In which a girl of Valyrian descent, finds herself in Westeros with impure intentions.

I suck at prologues, but here is a small glimpse.
""Right, so yada yada yada, 50 years before The Doom, there was a prophecy by one of the Targaryen descendants, Daenys the Dreamer. Unfortunately, she was as unreliable as a cup of water against a volcanic eruption; her dreams came in riddles, and she herself couldn't decipher them. There were more reliable seers, but she was famous because she had a good vision about some event that boosted the Targayens' power. Anyway, she stated that something would destroy Valyria in the future, but she did not specify what, and she got mocked for it. Seeing as the Targaryens were extremely loyal to one another, an insult to one is an insult to the entire family. Then, however, a more reliable seer in the Targaryen family had a vision that was more specific about the impending doom, including when it would occur, how it would occur, and what it would do. Aenar Targaryen, the head of the Targaryen family, was petty and did not wish for the other houses to know about this. People ridiculed them more because they believed he was acting on Daeny's dream when he began moving the family's assets from Valyria and Dragonstone. If you are not catching on, House Targaryens was a house of seers."