Orosen, Tranquil Acolyte is a Jade Brotherhood Ritualist boss in Xaquang Skyway. When you cross the invisible line where the boxes start, you will set off his patrol. He will walk with his cronies directly to the entrance to Senji's Corner and stay there if not engaged. He is a strong damage dealer and can keep his team alive a long time. Note that he cannot be interrupted when carrying Tanasen's ashes, so interrupt that spell if possible.