wind vs Bianca

I sent my spell hurtling out along with Susan's name, the last strength of my body and mind.
I saw her rise. Rachel's ghost. She appeared, simple and translucent and pretty, and put herself between Bianca's claws and Susan's throat. Blood gouted from the ghost, scarlet and horrible. Susan tumbled limply to one side. Bianca started screaming, high enough to shatter glass, as the bloody ghost simply pressed against her, wrapping her arms around the monstrous black form.
My spell followed on the heels of Rachel's ghost, and took Bianca full in the face, a near-solid column of wind, which seized her, hurtled her up, and then smashed her down into the floor. The overstrained boards gave way beneath her with a creak and a roar, and flame washed up toward me in a wave of reeking black smoke. I felt my balance spin and I struggled to make it to the exit, but fell to the ground.
Spirits flooded after Bianca, fire and smoke, following the vampire sorceress down the hole. The house itself screamed, a sound of tortured wood and twisted beam, and began to fall.


Grave Peril Chapter 38, Page 428