Vampire Darkness

Explanation

" When mom and dad

met dad was a vampire while mom was an angel. They fell in love and pledged to one another. When mom did that she gave up immortality by pledging to the devil. Years went by and they were happy they had each of us but only I was born with wings. The others we believed had no angel blood but when Sabina grew hers on her sixteenth birthday we thought that maybe we were wrong. The vampire blood and angel ichor created a half breed with the two sides fighting. When the wings are out the angel ichor controls them but when they are in vampire nature controls.  You on the other hand the two sides coexist and are compatible which means..." she explained quickly as she walked around me poking and prodding.
"What," I asked nervously.
"You are the most powerful person to ever live," she whispered and Sabina came then to my rescue, pushing her away. Nanette pushed her back but that was all it took for me. I let my wings extend and felt my power consume me. They grew to full length and height filling the room with their glory. I focused on her and  a similar orb appeared this time with a seed of darkness in it center. I fixed my gaze on her and flapped my wings in her direction sending the orb in her direction. She through up a shield but the darkness devoured it and my sisters stared dumbfounded. I stopped the orb and pulled it in.
"Nanette I hear by banish you from the depths of hell and the gates of heaven. Never again shall you be seen as angel or devil. I evict you powers from your blood. Forever!" I yelled at her but I did not say those words as something took hold of me. Ichor started rushing out of a cut on her arm and the blood separated then returned in its human state. The ichor rushed toward me kicking my hair up in an invisible wind as it did to my sisters.
Nanette collapsed and when I flicked my hand she vanished. I lowered myself to the ground and my sisters rushed to over to me.
"How did you do that," exclaimed Mabelle.
"I don't know." I whispered.