soulfire light vs anduriel

At the same moment, Nicodemus flung both his arms forward, and a terrible, smothering darkness came slamming down upon me.
I’d had two possible responses to his first attack in mind—and they had to be responses, not assaults of my own. When all this was over, I wanted there to be absolutely no question in Mab’s mind that he had turned on me, not the other way around. He might have come at me with his sword—it was how he normally preferred to do business, in every case that I had seen. A shield would have held him off, at least for a time.
Or, in his rage, he might unleash the full malice of Anduriel upon me. Which he had done.
This was not a normal circumstance for Nicodemus.
I’d prepared the proper defense.
“Lumios!” I shouted, as the darkness closed in, and I poured my will into the same light spell I’d used earlier—only I added a measure of soulfire into the mix.
The light leapt forth in a sphere and exploded into sparks as it collided with something that simply devoured it, swallowing it into nothingness as it streamed forth. The effect was damned odd-looking, from the inside. Light poured forth to be enveloped by a slither
ing blackness all around me, something that recoiled from the sparks and then came surging back in their wake with frenzied agitation—but the darkness could reach no closer than just beyond the reach of my arm.


Skin Game Chapter 43, Page 358-359