With the Patch 10.1.5 PTR, a new questline is available for Warlock players, ending in the ability to teach new customizations to their pets! We have previously previewed some of the new Imp and Felhunter customizations as they were datamined. Although the questline is currently not fully implemented on the PTR, we played through most of it to bring you all the details!
WARNING: Patch 10.1.5 minor story spoilers ahead!