“What makes you think she even has the power to oppose this thing?” Kratos said, irritated that the lad even brought up the witch. He disliked that she held such a power over him that he would think of her at such a time.
“My magic is useless against the Black Breath, and as you can see, there is no way around it. Odin saw to that long ago.” It was the witch’s voice.

God Of War - Midgard, Ch 16