Phantom Sea (EQ2 Quest Series)  

To give a bit more detail, you'll be given a jar of pickling brine and sent to the ceremony. Once you approach and participate, throw the pickling brine to start the chaos. You'll need to target and kill the Thoa Diviner first. He's the only agro target in the area. Once he dies, then you'll need to target and kill six zealots. They're not agro and not social, so don't let the mayhem distract you and watch your AoEs.