Which Witch

There once was a little girl with a secret. No one knew Other than one person.
As long as time has gone by every 85 years a new witch is born to a Wiccan family.
Serafina is the next which to be born into the Vexx family.
In the year 4002080 the first and only witch academy Open for young witches. Every young witch Starts her first year of school at the age of seven.
As Serafina gets older and starts to show signs of having powers, Her great grandmother starts to show her The strings in to help get a hold of her powers.
The vexx Family is one of the most powerful Wiccan family there is. Constanze Vexx Is the headmistress She is also Serafina's great grandmother.
Sarah Fina turn seven and October 31 ironic isn't it A witch born on Halloween.