Here's the mission guide from the ijji forums written by Elanne:
Mission Guide: Toward the Hall of Darkness by Elanne
[Opens new window at ijji forums]]
ijji will no longer be supporting S.U.N. and will be given to Webzen.com so a page has been made below, feel free to improve
TOWARD THE HALL OF DARKNESS
Map 1
[ 1 ]
Go North into the top left corner and the door will close behind you
A small mod will appear and attack you
Activate the Switch and kill the pillars
The door will open and you may then continue
[ 2 ]
L95 Elite
You will be in a big room with a lot of coffins and monsters
Red coffins summon mobs & 3 pillars
Blue coffins summon 1 special monster (easy kill)
Green coffins drop 1 healing potion Lv.4
Search all the coffins in Red and Blue provided below
Once completed it should show a message saying the Gravekeeper makes a noise
Search for the L95 Cursed Gravekeeper and kill him to obtain Gravekeeper's Note
[ 3 ]
L99 Captain
L? Elite
Head to where the (3) is on the map and kill the L99 Captain
Quick Warning:
-The next step will trigger mobs to spawn with one including an elite
-Once the Elite spawns you will be trapped until it is killed
Once completed go around and activate the coffins marked with pink on the map in #2
By opening these you will obtain three items - Old Sword Handle, Broken Blade, and Skull of the Nameless
[ 4 ]
Move to where the (4) is on the map and do as you did in #1
[ 5 ]
L? Captain
Next move to the room with the tomb and blow out the candles on both sides of the room
Kill the mobs and the Captain
After that you will obtain Mage's Skull
[ 6 ]
Approach the Altar in the next room
Invisible soldiers will appear in front of it
Mobs?
Kill them and click the altar to get Soldier's Skull
If there are any more places that are blocked by dark clouds then attack them with melee
[ 7 ]
L96 Cursed Blacksmith
Kill the Cursed Blacksmith to receive a Magic Hammer
[ 8 ]
L? Elite
Step close to the altar with the flowers next to it and an Elite with mobs will spawn
You will also be stuck within the area till certain Monsters are killed
Click the Altar to receive the Sword Jewel
[ 9 ]
2 L98 Elites
L100 Elite
Enter the wine cellar
kill the two Cursed Storagekeepers
Warning: One set of barrels spawns a L100 Elite Slime (Very Strong)
Search the Piles of 3 barrels till you find "Wine"
Go back to area (7) and Click on the Anvil and you will change your items to Knight's Sword
[ 10 ]
L96 Elite
Go back to the top of the map at (10)
Click the plaque on the right side (or to the South) to summon the Sidereal Knight + Mobs
Kill the Sidereal Knight to get "Knight's Skull"
[ 11 ]
L? Captain
Go to (11) and click on the Sacrificing spots in this order
-North
-South
-West
-East
-Middle
Kill the captain and take the portal to the new map
Map 2
[ 1 ]
L99 Captain
Go to (1) and kill the Captain to receive Priest's Seal
Crows will also spawn in the room
[ 2 ]
L? Elite
Go upstairs at (2)
Kill the Elite
Pass through the door
[ 3 ]
L99 Captain
Kill Captain 99 Necromancer of the Silver Seal and get Mage's Seal
[ 4 ]
L97 Elite
Go into the next room marked (4)
The door will lock behind you spawning spiders and Elite 97 Queen Cadaver Spider
[ 5 ]
L99 Captain
Heading back down you will be blocked
Mobs + L99 Captain will spawn
Kill Captain 99 Follower of Dead Souls to receive Naga's Orb
[ 6 ]
L? Elite
Head Upstairs at (6) and kill the Elite like before in #2
[ 7 ]
Head to the next room (7) with the fountain
Run through all 4 grass patches (each summoning plant Monsters)
Kill the plant Monsters
Click on the Plant at the fountain to get another Summoning Stone
[ 8 ]
L? Captain
You will be blocked at (8)
Kill the Captain to get another Naga's Orb
[ 9 ]
L? Elite
Go where (9) is and click on each statue
This will spawn an Elite with about 4 more monsters
Kill the Elite and proceed to the next room (triggering mobs?)
[ 10 ]
L100 Captain
Kill Captain 100 Dimension Necromancer
Take Portal to next room (Heal Before going in)
Map 3
Very Small Room so be careful
L102 Captain
L? Elites
Mobs will spawn once you make a step forward once in the room
Kill the Crystals to Make the Captain spawn with mob Elites
Kill Captain 102 Dark Bishop
May have to kill Pillars for portal to open
