gw2-eventYou will be required to use your “Special Action” key during this boss fight. You can set this key in options > control options > skills. This key should be accessible.

This fight is quite straight forward and not too complicated. The mechanics are easy to pick up, and shouldn’t take too long to master.

Slubling Run

At the very start of this fight, you will need to make your way through a passage to the main boss area. This area consists of two types of Slubling. The general ones, and Evolved ones. This is a short tutorial giving you access to mob mechanics before the main fight.

I will go into further detail in the Slubling section below.

General Mechanics

There are several mechanics which will make or break this fight. The encounter is fairly simple, but there is a lot of spacial awareness required.


Throughout the fight someone will be fixated. This changes randomly between the players in the squad, so there is no need for a tank in this fight. Fixated players will need to pull the boss around the area to safe points where the rest of the group can attack.

This mechanic is the most prominent, so everyone should understand how to deal with it. If you’re fixated, there will be a purple glowing marker above your head. Everyone will also see an announcement on the screen when fixation changes.

Your goal is to move the boss around the area safely and efficiently. This guide covers the basics of tanking this boss.

Guild Wars 2 Slothasor Raid Guide


Poison will be randomly applied to members of your group. Once this happens, there will be a green skull marker above the player’s head. If you’re marked, get out and away from the group as fast as possible. You will need to take the poison to the edge of the area and drop it as far away as possible, preferably behind the group and next to a wall.

Once the poison is active, it will slowly grow form a small circle to a larger one. If dropped in the wrong place this will fill the area, resulting in a possible group wipe.

This requires you to have your special action key bound to an accessible key.

Guild Wars 2 Slothasor Raid Guide Guild Wars 2 Slothasor Raid Guide

Poisoned Ground

As you enter the area you will see that the floor is glowing a bright green. The area is covered in a poison which needs has to be cleared. Standing in the poison will cause damage to to affected players. Several players will need to eat a mushroom and clear a path for the group.

This is further detailed in the section below.

Imbued Mushrooms (Slubling Form)

During the fight, you will need to appoint several players to eat mushrooms around the area. This requires a player to run up to the imbued mushroom, interact, and clear the smaller mushrooms around the area with skill 1. This allows your group to move around the area and stay safe. There are several ways to deal with this, most groups assign 4 people and have several back ups for when someone has poison.

There are two main paths which your group might use, inside path or outside path. This all depends on how the commander wants to deal with the slubing mobs.

After becoming a Slubling and eating mushrooms, you will gain the debuff Nauseated. This will stop you from eating further imbued mushrooms for 4 minutes.

Becoming a Slubing has it’s purpose, but it also has it’s dangers. If your group isn’t paying attention they may kill you by accident. Once transformed you become hostile to your group. So keep in mind where your group is, and what they’re doing before consuming the mushroom.

Guild Wars 2 Slothasor Raid Guide Guild Wars 2 Slothasor Raid Guide

Slubling Mobs

Throughout the fight there will be an infinite amount of Slublings spawning in the middle of the area. You need to deal with these enemies throughout the fight. Ignoring them will just result in death due to how many can spawn. The most common way to deal with these enemies is to reflect and pull them together on top of the boss. This allows the main group to cleave and kill them while attacking Sloth at the same time.

As the fight progresses Evolved slublings will begin to spawn. Even though killing the boss is a priority, killing these enemies should also be a main focus.

Keep in mind that Slublings may apply mass amounts of conditions, but they also corrupt boons. If left alone for too long they can pose a threat to the group.

Slothasor Boss

Out of all the bosses Slothasor is one of the most straightforward. He only has a few attacks. But this fight is very dependent on arena mechanics. Sloth is a highly telegraphed boss with a lot of tell signs.


This will be the first attack Slothasor performs on the group as you start the fight. He will slam his claws against the ground much like Gorsevals rampage attack. Orange AoE circles will appear under each player. The circles will pulse 3 times, knocking down whoever is standing in them.

Players should stay as close to Sloth as possible during this attack. This will help avoid spreading the AoEs across the arena. It is possible to be knocked down by other player AoEs, even if you dodge away from your own.

Guild Wars 2 Slothasor Raid Guide


Every so often Slothasor will stand up tall, then lean forward to release a fiery breath towards whoever has fixation. This is fairly easy to avoid due to the highly telegraphed animation. As things get hectic, it’s possible to end up on the wrong side of Sloth as he does this attack.

It will instantly down players and possibly kill some classes due to the high damage tick.

Guild Wars 2 Slothasor Raid Guide


While moving the boss around, he will swing his arms at the fixated. This attack deals very little damage, but it’s best to avoid it at all costs if you’re prone to easy death.

Spore Release

At 50% and 25% Slothasor will start to do a new move set where he will shake. As he does this attack the area will fill with poison spores. If players are hit by too many spores they will take massive damage and down. The best way to avoid this is to save dodges for this attack. There’s very little reason to dodge in this fight, so you should always have stamina to avoid this attack.

Guild Wars 2 Slothasor Raid Guide


With every 20% Sloth will fall into a deep sleep. When this happens your group will need to use crowd control skills such as stuns, chills, knockbacks, pulls and so on. This will destroy the Defiance Bar, waking up Slothasor from his slumber.

After every Defiance Bar mechanic, Slothasor will stand up and fear everyone in the vicinity. You should have a stun break or a block accessible after this attack.

There are various classes with party wide stun breaks, Protect Me on Druid, Guardians Stand Your Ground! and Tempest’s Gale Song. Players who’re not broken out of this fear will end up in the poison fields and die.

Guild Wars 2 Slothasor Raid Guide