Posted from the Lineage Forums by Forge!
If you are attempting to complete the Quest for Desire Cavern, you MUST delete any ToS 2F or 3F Keys. You may wait until you've collected all of your seals, though you will not be able to use the Consel NPC in ToS until you delete your ToS Keys.
Desire Cavern is Located at location (32759, 33459), Northeast from Windawood Castle's top rampart. Desire Cavern (DC/ToG) is the opposite of Temple of Shadows (ToS), and the monsters here give karma for the Yahee side of karma (ToS is Demon Karma). The reward for Desire Cavern is an Amulet of Kahel. There are four different Elemental Areas in Desire Cavern, Earth (South), Water (East), Fire (North), and Air (West).
1. First, you will need to have 0 Karma level. If your karma is Demon karma, you will need to hunt Desire Cavern monsters to lower your karma. Once you have level zero karma, you can begin collecting seals. You will need to collect a total of 810 seals combined from the elemental rooms in Desire Cavern. Here's the recommended path for different classes:
Melee (K/DE/E/P) 10 Air Seal 100 Fire Seal 200 Water Seal 500 Earth Seal
Summoner (M/E) 10 Water Seal 100 Air Seal 200 Fire Seal 500 Earth Seal
The reason mages and elves can do it differently is because they are able to use their summons to help them collect seals. Also, Elf can do either way just fine.
2. Once you've decided which path to take, you approach the door of your choice and when you speak with the door, it will give you the option to "Remove the Protruding Object". Click this if you're sure that's the door you want and you will receive the item "Pass of..". Next go, speak with the door again and use the option "Use the Pass of.." this will bring you into the elemental room. Hunt here until you gain your desired number of seals (10 first), then escape and come back to that same area door. Speak to the door and click the option "Use the Pass of..." and you will receive "Commander of..". You are now finished with this room and you can move on to the next room, and repeat the process once you've gathered the required amount of seals for each room.
Please note that once you've gotten a Pass of Earth/Water/Fire/Air, you cannot go to a different elemental area without deleting your Pass and the seals that go with it. Once you get a Commander of an Elemental room, you can always travel to that room, no matter which Pass you have.
3. Now you have all 4 Commanders and you want to finish your quest! Travel to ToS and speak to the NPC "Consul" and click the option he gives you to Go see Yahee. He will teleport you to "Yahee's Labratory". Yahee is roaming around the floor (there are no monsters) and you want to speak to Yahee and select the option "Make a Ruler of the Elements. He will give you the Boss-key for Desire Cavern. Also in "Yahee's Labratory", you can speak to "Assistant of Yahee" to receive your Amulet of Kahel.
4. Now you're ready to kill Varlok (Desire Cavern Boss) and get Technical Document: Counter Barrier (hopefully)!! The door for Varlok Boss area is in the main Desire Cavern chamber to the North-east (around 1 oclock on a watch). You can now enter this portal with your Ruler of the Elements. Just like Tarak or ToS bosses, Varlok needs a special buff to kill. Once you see Varlok up, run back to "Yahee's Labratory" and find the NPC "Army of Yahee and he will give you the buff. Now run back to kill Varlok and get your Counter Barrier on!
Goodluck!