A Noisy Diversion - Act 4 Side Quest
Start Location: Argolis
Quest Location: Argolis
Objective: Defeat Blood Queen Leucothea to the south
A Noisy Diversion is a Side Quest that begins by speaking with Menestheus in Argolis. Menestheus is found southwest of the NPCs who give you the Hades' Generals and Shards of Erebus Side Quests. He'll be surrounded by enemies and battling them with his fellow soldiers when you arrive.
Speak with Menestheus to begin this quest and then follow his soldiers a little bit to the south where you'll find Blood Queen Leucothea, the boss monster you'll need to defeat for the quest. Blood Queen Leucothea will be surrounded by other Melinoe enemies whom you should defeat prior to engaging her. It doesn't matter if all of Menestheus' soldiers die so let them handle the extra enemies for you if your gear is lackluster.
Once Blood Queen Leucothea is defeated return to Menestheus and speak with him to turn in the quest.