I have a bug in act 2 the Magister Jonathan in the oil quest on the oil rig to save the hanging sorcerer- when he dies he spawns a level 8 unkillable "dallis assistant". I can heal it but it is immune to all damage. After I kill all the magisters/blobs it will still just attack my party until I quit or flee. It makes the quest unfinishable as it will kill the hostage sorcerer.. game breaking.