The Adventure Zone 05: the Eleventh Hour by Clint McElroy
The Bureau of Balance has located yet another Grand Relic, and this time it's...time? A small mining town called Refuge has been locked away behind an arcane bubble, and somewhere inside it the Temporal Chalice is causing unknown mayhem. Taako, Magnus, and Merle are launched into their investigation, but they've barely had a chance to get their feet under them before the situation literally falls apart.