What happens in Chapter 39 when Fitz is fighting Will and Regal's army?

During the fight, Fitz backs against Realder, one of the stone dragons, and bleeds on him. Fitz reaches out to the dragon with Wit, and with Nighteyes assisting him, they are able to awaken that dragon and many more. The dragons are very hungry and eat Regal's army. Then Fitz and the Fool decide the dragons and other stone creatures must fly to assist Verity, and they do, leaving Fitz and Nighteyes alone.