The dream sequence transitioning to reality was really well-done, and again, the confusion natural to the situation is portrayed perfectly. Deni's frustration aimed at the Vis was also a nice touch, and it feeds in well to his difficulties with Castus magic. Although it's a minor detail, I also like that Deni immediately identified the creature as a daemon, based on his experience with them. No maybe, no possibly, but disbelieving recognition.
I look forward to seeing where the portal goes and how Deni manages to get out of his predicament. He's running short on limbs to use.