The mage had quite a grip on the staff, and Trey was having a lot of trouble prying it out of his hands. While he tried to release the mage's grip, he noticed several of the corpses rise, and thankfully he jumped away just in time to escape a swing of the mage's staff. He then tried to engulf the zombie in flames, like he'd done to that other zombie outside, but that didn't work nearly as well this time.

 "What's going on?" Trey asked. "That zombie outside died in one hit from the fire spell. What makes this one so special?"
He backed up, trying to put as much distance between himself and the zombie mage as possible, but he didn't get as far as he wanted to. The treasure room was tiny compared to the outdoor environments he was used to fighting in.