The action in the eighth chapter featured in Lord of the Rings: War in the North, starts near the fortress of Carn Dum.
It is a snowy area and you have to discover a way to enter the fortress. You know that Agandaur is inside, and now you must enter and kill him.
This area is similar with Mordor; therefore expect to encounter multiple orcs, and their leader, Agandaur.
Zone: Carn Dum
Main Quest: Discover a way into the fortress
Proceed up on the mountain, following the path in front of you.
You will have to cross a bridge, located on the right side of the road, and you will enter the sewers.
The goal of your main objective will change.
Main Quest: Search for Agandaur within the fortress
In the sewers there is only one tunnel that can be followed, but there are also many dead ends. Make sure you check them and destroy all barrels and crates you see, for additional gold, arrows and items.
Eventually, you will reach a dead end and your objective changes. You need to find a lever to open a gate.
The lever is located on the right side of the hall, while facing the dead end. You cant miss it because its highlighted.
Pull it and a door on the other side of the room you are standing in, will open; however this lever will also open several cells and Agandaurs prisoners will escape and attack you.
Take them out and go back, until you reach the door you have opened.
Advance and check the left side of the corridor for a chest and the cells for more barrels and crates.
Proceed through the glowing sign.
Kill the barbarians that attack you and move on the terrace until you reach a new glowing sign.
Eventually, you will come across some stairs. Go up but stay alert because you will be attacked by a vast number of creatures, such as trolls, goblins and barbarians.
After you kill them, a gate on the right will open. Go inside and loot the chests, then, pull the highlighted lever.
More doors will open.
Slay the trolls that appear and follow the gates that opened, and then the terrace and the wall, until a cutscene starts showing Beleram fighting a flying beast similar to those possessed by Nazguls in the motion picture.
Watch the cutscene and talk to Beleram, to receive a new goal.
Zone: Carn Dum Citadel
Main Quest: Defeat Agandaur
Enter the next zone using the glowing sign located to the left while facing Beleram. Make sure you enter only when you are ready to fight Agandaur, the final boss featured in Lord of the Rings: War in the North.
The battle against Agandaur features multiple phases. He can be compared with Wulfrun but he is more powerful.
The boss teleports from one place to another and when his health drops to 1/2 he spawns a Fire-hammer Troll and he vanishes.
Kill the Fire-hammer Troll and Agandaur will re-appear but he is accompanied by his lackeys.
Clear the room and focus on the boss, until he vanishes again.
Use your special attacks all the time.
To catch him you must go back on the wall and the second phase will start after a small cutscene.
During this phase, Agandaur will use lightning attacks against you. Dodge and dont get near him when he is flying around.
When he levitates, use your bow and aim for his head to inflict higher damage.
Eventually you will bring him back to the ground and you can use your melee attacks.
Practically, if you wish to defeat him you must combine the strategy you have used to defeat Wulfrun with the one used to defeat the Wights.
At one point you will be informed that you can call Beleram to aid you in battle. Try to avoid this, and you will unlock the Eagle Savior Achievement/Trophy.
For defeating Agandaur you will unlock another achievement/trophy called Hero of the North.
Now, watch the final cutscene and keep your promise to Urgost, the Dragon.
Congratulations! You have completed Lord of the Rings: War in the North!