The inky black substance crawled up Feng Qing'er's body, adhering to her skin and refusing to be defeated no matter how hard Feng Qing'er pushed her flames.
That inky black substance was, after all, something that was given to the Commanders, or rather, the Apostles, by the Nox itself. There was no way something mediocre would be able to compete with it.
The Void Essence, even when it was as low level as Damien's, was something inviolable especially when it came to devouring. It was impossible for the inky substance to compete with it.
But Feng Qing'er's flames didn't carry the same danger. Perhaps if she had reached her mother's level and blossomed into a true Fire Phoenix, it'd be a different case, but she was still in what could be considered her Adolescence Phase.