The Talon of Horus pg. 398

Nefertari took to the air, cutting past him and swinging with her klaive. She was a silken blur, moving faster than I had ever seen her move. Fast enough to weave between the bolt shells streaming around her, fast enough to slice through the primarch's cheek, severing half of the muscles in his charred face. But he had weaved aside. She'd missed the killing blow. The female who had killed Legion warlords without shedding a single diamond of sweat had missed her killing blow. Horus was too fast, even for her.