Bull hesitated at Geralt's touch. He hadn't heard him approaching, too focused. This was not something he wanted to do poorly. Reluctantly, he lowered his hand and loosened the cord he'd managed so far.

"If there is risk of corruption? Yes. There is a demon out there compelling people. And some of those people just burst into flames."

He'd heard through the underworld grapevine that it was a demon. He knew Biffy was investigating, and Bull was following their progress from afar. He wanted to kill it, but he would let the wolves track it.