Ithrilis High Priest

From the Gates of the Ithrilis Temple go two rooms south and one room west. Go south into the Pool of Faith and locate a sea serpent. Kill the sea serpent to get the porcelain key and go back north out of the pool. From the Lobby of the Ithrilis Temple go three rooms east and prepare yourself for underwater CPK. (You will want to be levitating at least. Underwater breathing helps but isn't necessary if you move quickly.) Go one room northeast and then down. Move six rooms south, and six more west, then go two more rooms north. (*Note, you can change back into normal gear as there won't be any more CPK.) Go three rooms east and then one room south. Move one room east (through the wall) and you will find yourself in a dizzy NPK hallway. (Using scan will help you determine how far you are from the doors in this hallway. As it is underwater you will want to get through as quickly as you can.) Open the first door and keep going north to the second door which you will need to unlock with the porcelain key. Open that door and once you get through you won't be in PK anymore. You should find yourself on a Small Landing. From here you will need to go two rooms west and one room north to find the High Priest of Ithrilis. Once you are finished in the area go one room south, two rooms west, and down. You should then find yourself Before the Mighty Fountain of Life.