Vibax's need for sacrificial objects results in a simple grunt of acknowledgement at Zeph's command as he carefully undoes the bracers off the victim, surprisingly unconcerned that there is a guard nearby. If Derek's bald head sports any kind of fancy head wear, Vibax also takes it.
Once he has the bracers in hand, he casually stands, stuffing the taken objects into a pouch under his cloak, carefully stepping around the expanding pool of bodily fluids and casually walks through the door into the daylight without turning to face the guard.
Time to get lost in the crowd.
Vibax leisurely strolls a scenic route as he makes his way back to the Hall. If he finds himself sufficiently alone, he makes some changes to his disguise in case there are any parties interested in following up on the day's events.