Temple of Azra Spoiler Below
Many people seem to have trouble with the Temple of Azra quest so I've included a detailed description of how to get through the Temple here. I hesitate to include it because it is so detailed and I strongly encourage everyone to try and get through the Temple on your own before resorting to this explanation. The Temple can be a lot of fun and you can get lots of gold and loot. Note that I haven't included fighting in all of the rooms in the Temple here. You have the choice to fight in all of the rooms or not - I think it is always worth fighting in these rooms because you will receive great loot, including some health and energy potions, weapons and gold but it is your choice to fight in them or not.
Enter the Temple with the key obtained from Drake Island. After fighting two skeletons, go up the stairs into a large chamber. This is the temple first floor main room. Go down the passage on the left. At the end of this passage, climb down into a pit with fire and follow to the back corner of the room (this corner will be on the same wall that the ladder you just came down on hangs on). Turn the handle in the corner to open the gate that blocks off the hallway you just passed coming down into the fire pit. Go back to that hallway and follow it until it ends with another switch to turn. This switch opens the gate blocking the path above the fire pit you were just in. Turn the switch and enter the hallway that was just unlocked using Helga's ring. Turn right at the end of the hall and follow the hallway to the end, where one room is located. Fight the skeletons in this room and collect the loot from the chest, which will include a Temple Key. Return to the first floor main room.
From the first floor main room, go down the right side hallway (right side if you are facing the statues and away from the stairs) until you reach a closed gate. Use the Temple Key to open the gate. Go through the hallway with the pendulums and fire pits. At the end of this hallway, enter the Temple Second Floor.
Go down the stairs into the Temple Second Floor Main Room. Go down the hallway to the left (it is the hallway that isn't blocked by a gate). Follow the hallway to a room with a fire pit, pendulum and walkway winding upward. I find that it is easier to go through this room using Helga's Ring or a Greenfin Stew. It gives you more leeway with your movements and you are less likely to fall into the fire pit. Once you reach the top, enter the hallway and follow it to the end. Enter the room, fight the skeletons and retrieve the Temple Key from the chest. Return to the second floor main room.
Use the Temple Key on the gate blocking the hallway on the right side. Follow the hallway to its end and enter the room there. Fight the skeletons and retrieve the loot from the chest in the room (which will include a Temple Key). Return to the Temple Second Floor Main Room. Go up the stairs on the side opposite the ones you came down when you entered the second floor (it is the side with the full body statues). Enter the Temple Third Floor.
Go down the hallway to a small open area, the Third Floor Main Room.
There is a hallway right in front of you in the main room. Go down this hallway until you reach the end.
Turn to the left and enter the first room on the left. There is an obelisk in the room with a green arrow flashing over it. Rotate the obelisk. Return to the third floor main room.
From the main room (facing away from the door you entered to reach the third floor), turn left and go down the hallway with the purple wall hanging on it. Immediately to the left of the wall hanging, there is a hallway. Go down this hallway to the very end. This is very important - the room is hidden and you cannot see it until you are at the end of the hallway. Enter the room and rotate the obelisk.
Treasure - apart from the chest you will receive for fighting the Ancient Lich, there are three other chests on the third floor. I can only describe the location of two because I'm never exactly sure where the third is located and I must search for it every time I play. Here are the locations of the other two:
From the main room (facing away from the third floor entrance), go down the hallway immediately in front of you. At the end of the hallway, turn right. The chest will be on your left.
From the main room (facing away from the entrance), turn right and go down the hallway. Turn right at the first hallway you encounter. Walk down this hallway until you reach the end. Turn right and walk until you are approximately half way down. Turn down the hallway on your left and walk to the end of it. In a room on your right, there will be a chest. Return to the main room.
From the main room (facing away from the third floor entrance), go down the hallway in front of you. At the end of the hallway, turn right and go to its end. Go through the gate on the left. There is a ledge there.
From the ledge (by the way, this is also a very good place to save your game), you must walk off the end of it. You can use Helga's Ring or a Greenfin Stew to make it a gentle descent. Even if you don't use the ring or stew, however, another ledge will appear beneath you. You must walk off the end of two more ledges until you reach the bottom.
Stealth Attacks - like some other big fights you will encounter, you cannot use a stealth attack against the Ancient Lich.
Rear Attacks - the Ancient Lich has an attack it uses that will kill you instantly once it touches you. The key to staying alive and defeating the Lich are to get around it and attack from the side or back.
Fight the Ancient Lich and retrieve the Scepter of Hammara. Return to Callaheim.