Another lost Mikaelson sister

What am i ?

I tried to talk to him but he buried my father fast and left with the others so i followed them carefully , I spent days in front of their house hiding in the shadows and spying on them i was listening to everything , their family problems , their fights , i knew everything about them , my mother had seven children but two of them died so she now has five Finn , Elijah , Nicklaus , Kol , Rebekah and not counting my self because she never considered me as her daughter .
I also stoll her grimoire and learned many new things , i am what people call a vampire , i feed on blood and i am immortal the only thing capable of killing me is the white oak stake and my siblings destroyed all of it so i am immortal , the sun burns me so used one of my mother's spells in creating a day light ring which protects me from the sunlight . As a vampire i am strong, fast , every human sense became hightened , i see everything , i hear everything , i feel everything i am invincible , specially that i became a witch i am absorbing magic from being a vampire , i am absorbing it from myself .
But with all this power i've never gave up on my father death i had to take revenge from those who killed him .