Remove the Head and the Disease Will Die

Quest giver: Apothecary Cadmael
Requirements: A Corrupted Arch Priest
Request Phrase: work
Entry Phrase: ready
Reward: Chronobines, Timeshear Purple Fragment Beza

Inside the instance you'll find that the door heading southeast is locked, clicking it will give a message that its severly rusted and update your task (no clue why). At this point a named, Machinator Grengwar, spawns behind the secret bookcase in the library. He's nothing special, kill him and loot a key. At this point another named spawns, Prime Lector Quilok, in the east wing. Again its nothing special and drops a key. Once you have both you can open the locked door at the zone in. Clear your way south through the Bubonians to the far south room. Kill the Scumlord Heyanti, pure melee, and then go back to the Apothecary to finish.