GW2 Underground Facility Fractal Guide

GW2 Underground Facility Fractal is part of the Fractals of the Mists dynamic dungeon. You can read about Fractals of the Mists entrance and other fractal guides in our Fractals of the Mists Guide.
 

Objectives for Underground Facility Fractal

1. Open the gates to next level.
2. Use dredge mining cannons to destroy the door – Reinforced Door.
3. Subdue dredge forces – Dredge / Rabsovich.
4a. Destroy the dredge powersuit – Dredge powersuit.
4b. Vanquish the rampaging ice elemental – Rampaging Ice Elemental.
 

1. Open the gates to next level.

To start this Fractal off you will need to solve a pressure plate puzzle. In order to do this you will have to stand on different pressure plates in a specific order.
 
To start off have one person stand on the pressure plate in the south east part of the room. This will open a door to the middle passage and the path to a pressure plate on the North East side of the room. Have someone stand on this plate which should open a second gate in the middle. Both players are safe to leave their plates now and the whole party should join up and head into the main room.
 
Once in the main room enemies will continually spawn, so you will need to get though this part as fast as possible. You will need to send two members to stand on the two pressure plates in this room. Once they are on the plates a third member will be able to use a control panel in order to open the door to the next area. The control panel requires a member to channel the activation for about 15 seconds while enemies attempt to attack and interrupt the channel. The pressure plates must have a member on them for the entire time the third player is using the panel so make sure not to leave them until the action is complete.
 
Once you have successfully opened the door head through it to get to the next area.

2. Use dredge mining cannons to destroy the door – Reinforced Door.

There are two roads / tunnels that game can take you here, and both end with destroying the Reinforced Door at its end. There will be many enemies constantly spawning in the hallway with a big heavy door at the end. In order to open the door to you will need to pick up bombs littering the hallway and place them by the door until it blows open. The enemies will stop spawning once the door is blown open.
 
Note- A good strategy to use here is to assign one person to transport bombs to the door while the other members fight the enemies.
 
On higher level more enemies will appear and they will respawn faster. This gets even more serious on level 10 and above.

3. Subdue dredge forces – Dredge / Rabsovich.

In the next room you will be greeted by groups of enemies and a mini-boss Champion Rabsovich. The adds can start doing some serious damage so make sure to control how many you are facing at once as you don’t get overwhelmed while simultaneously dealing damage to Champion Rabsovich. More enemies will spawn from a tank in the middle of the room as the fight progresses. Once you finish everything off the path will be opened and you can proceed to the final boss of the dungeon.
 
Higher level versions of the Fractal will bring an even larger number of enemies out of the tank in the middle of the room. Champion Rabsovich will also gain the ability to send out ground waves that will travel to party members and deal some serious damage. On level 10 and above it is recommended that you engage Champion Rabsovich in the hallway before the tank so you can engage him without needing to worry about the additional enemies. You can then use AOE attacks on the remaining enemies for an easy kill.

4a. Destroy the dredge powersuit – Dredge powersuit.

Your next task is to destroy the Dredge Powersuit. If you try to attack him outright you will find that your attacks aren’t doing a whole lot of damage. What you need to do is lure him under the buckets of lava so one of your party members can activate controls that will dump the lava on the Powersuit. Once this happens you will find that your attacks do a lot more damage, and the boss will not be able to regenerate his health. You will need to keep up this patter throughout the fight in order to do enough damage to defeat him.
 
The boss can place bombs under the feet of the players that will kill you unless you get out of the blast zone fast enough. If you see the boss start hitting the floor with his arms that means he is about to start regenerating his health. Make sure to interrupt him when he does.
 
On level 10 and above this boss will use Agony from time to time, which will bring a full hp target down to about 10% of their health. Make sure you are ready to deal with this when the time comes.

4b. Vanquish the rampaging ice elemental – Rampaging Ice Elemental.

You can choose to fight an optional boss at this time as well, a Rampaging Ice Elemental. You are going to need to lure him to the buckets and dump lava on him just like with the Powersuit in order to do enough damage to bring him down. He will, like the Powersuit, heal the damage dealt to him on occasion. You will know when he is doing this because he will kneel. Make sure to interrupt this as soon as you see it start. He will also spawn sometimes additional enemies that will need to killed as they appear.