Bianca blocks Harry

I snarled, my temper snapping. I lifted the blasting rod, whirled it around my head as I drew in my will, and snarled, "Fuego!" Power exploded from the rod, circular coruscations following a solid scarlet column of energy that lanced forward, toward the vampire's head.
Bianca kept smiling. She lifted her left hand, mumbled some gibberish, and I saw cold darkness gather before her, a concave disk that met my energy lance and absorbed it, scattered it, sent smaller bolts of fire darting here and there, splashing on the floor in small, blazing puddles.
I just stared at her for a moment. I knew that she'd known some tricks, maybe a veil or two, a glamour or two, maybe how to whip up a fascination. But that kind of straightforward deflection wasn't something just anyone could do. Some of the people on the White Council couldn't have stopped that shot without help.
Bianca smiled at me, and lowered her hand. The vampires laughed, hissing, inhuman laughter. The hairs on the back of my neck stood up, and a cold shudder glided gleefully up and down my spine.
"Well, Mister Dresden," she purred. "It would appear that Mavra was an able instructor, and my lessons well learned. We seem to be at something of a standoff. But there's one more piece I'd like to put on the board." She clapped her hands, and gestured to one side.


Grave Peril, Page 419-420