Getting there
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Enter the cave north of the Waypoint, and take the right hand path to the frozen chambers. Reach the back of the cave in Sector Zuhl, climbing over an ice formation to reach rear chamber.
In the center, you will find a large rock formation surrounded by hostile Murellows. Jump up the path spiralling around the middle. Watch out for Pressurized Ice; if you get too close it will knock you back – potentially very far! Look for piles of snow littered throughout the area. If you use them, you gain a three minute buff that allows you to throw clumps of snow, triggering the hazard at range. Alternatively, you can destroy the ice with a ranged weapon.
Once you've reached the top, you will fight a Veteran Murellow. Then, run through a short passageway to find the pit with an old mining machine at the top.
Jump down carefully, avoiding the fire cannons and AoE on the ledges, to the rock ledge on the east edge, opposite the cannons. Once there, look north; there is a small passage that leads to a cave with a chest in it. Beware of suicidal Volatile Destroyer, which charges and explodes when you go near the chest. There are also falling rocks.
Once down, make your way across the pipes toward the northern side of the cavern. Watch out for the lava – it hurts! There will also be Volatile Destroyers that explode and set you on fire when they touch you. When you reach a large open area on the center platform, there will be an event to survive a destroyer assault.
Make your way up the ramp on the northeastern side of the room to reach the entrance to the final cave. This cave is typically guarded by a Veteran mob. Once you cross the threshold of this final cave, you will earn the achievement, and the final group event will start.
To reach the chest, defeat the group event. It's possible to beat it alone with a high-level character. Having a way to stop burning is recommended, although the smartest way to kill the troll is by using the pulsing lava font that appears every 10-15 seconds or so. Do not stand in it yourself, as it deals 3000 damage per pulse! When you do find yourself in the lava font, dodge it. To kill the troll, lure it to the lava font every time you think it will burst, and when it is at the position you want it, dodge through him. He will use his attack, which will keep him immobilized for a second or so. To reduce damage taken from the troll's attack, use a skill which grants swiftness; when you have swiftness, you can just circle around him closely, but when you don't have swiftness, keep your distance!
The chest is located on the northern side of the cave. You can get the achievement without beating the group event.
- Treasure Chest
- This achievement name is a reference to Ghostbusters
- The chest you get at the end is a Borderlands easter egg. (watch how it opens)