Zach reacted instinctively when Prudence began her attack, going for the smaller prey, Umbram reforming just behind him. Zach put himself in between the smaller vamp and the phone, while Umbram veered off to assist Prudence in her assault on the taller one. 

"I'm not sorry to say that this is the end of the line for you immortals."He said as he appeared in front of the small vamp, hopefully slowing him down enough for him to be hit by Prudence's knife. 

Then he would strike.