Fathien Walkthrough Courtesy of Outrider322

When you first go down the elavator to get into the tomb there are 2 doors, 1 door leads into a room with 4 levers (2 levers on each side) the other door leads to the rest of the dungeon (armor is not in this part) enter this part first! go through and fight some monsters in the first room of this part, then enter a hallway (only other way out of the room) scan the walls of the hallway closely there is a "Loose Brick" that you can push which opens a secret room in the hallway a little bit back, in the room are several monsters a chest, and one of the levers you need to open one of the passages in the other part of the dungeon. Now continue down the hallway like you were before. eventualy you will come to a gate/door that you can open with your tomb key. behind the gate is the begining of a sewer system. Follow the sewer system (you will come to a part where you have the choice to branch off to your left or continue. CONTINUE following the straight path!!!) eventually you will then come to a room where you can climb up the water, do so. now there is a staicase going up, follow it untill you enter a room with a structure in the center that is open on 1 side and contains a chest, ignore it for now (this room is the first one you come to after the stairs) take the LEFT path and you should be heading down some stairs and follow the path till you enter a room with several collums and a pit with water at the buttom. The floor has collapsed so now you must jump on several small bits of floor mostly connected to the collums untill you reach the other side, once you reach the other side follow the path into the prison section. in the cells are several chests and more importantly the missing son Vetrean or somthing like that. talk to him as much as you can.

Part 2
Now do you remember the room at the begining with the 4 levers, go back to it. Once you are there you may have to experiment with the levers a bit but basicaly each side should have 1 lever down and 1 lever up, i bleive they are in an X patern. once this is down the wall infront of you will open into the next section of the dungeon, this section contains the Argailia armor. Now when you enter you may have to walk through a short hall (don't exactly remember) but you will come to a part where the path ends and a new sewer sytem begins. Jump in the water, now in one of the under water tunnels (1 to your direct right and one to your direct left after jumping in water) holds the second and last lever. You will have to see which one it is in. try to look carefully but try not to die from no air as well, to some it may be easy to miss depending on your pc's graphical capabilities. once you have the lever head back to where you first entered this sewer system. go forward a bit and you will come to a room with a small platform that has to slots that take your levers, and on each side of the room there are sealed passageways (all containg water) this pasages are blocked by gates, the levers open these gates buy placing them in the slots on the small platform. Now one of the pasages (right or left) holds the argailia, i think it might be the left one. as you swim down the passage you will pass by platforms which you must jump on and on each is a door that seems to blend in with the graphic of the wall a bit but the option will come up to open the door. Inside these rooms are large groups of differing monsters (different types of monster groups in each room) and several chests.

Now pay ATTENTION to this nect part as it is easy to miss it. In one of these rooms i believe the last on each side (remember how i sade there are 2 passageways one left and one right) there is a button on the wall, you MUST carefuly exam the walls of these rooms for the button this opens up a wall in the room and leads you to another room, in this room on BOTH sides there will be some kind of phantom Fathien, and the room also spawns unlimited skeletons while the phantom is alive, so Liquidate him quickly. Now the only difference between the secret room in either passage is that one holds the Argailia of Elrydor or whatever the correct name is. once you have it go all the way back to the entrance of house fathien (which is now unlocked) be ready because as soon as you exit there will be 2 elf elite guards that will attack you.