gw2 event icon The “Special Action” key is used during this boss fight. You can set this key in options > control options > skills. This key should be accessible.

Mastery Icon You will also need the Forsaken Waters Mastery to take part in this fight.

Arena Mechanics

This fight is quite complex compared to most raid bosses. There are several phases that all do different things, but a few mechanics affect the fight from start to finish. This fight has a lot of mechanics that tend to be random. The phases do not change, but player focus does.

Blood Shard Shield Reflect

During the fight, one or two players will need to reflect Matthias. He will cast a protective bubble and target one player. This one player will be his key focus for this attack during the fight. The fixation will change if they die at any point. Once this attack happens, a player needs to reflect the projectiles back at Matthias to remove the Blood Shield stacks he has. Failure to fully reflect his projectiles, will result in a secondary player reflecting him to break the shield.

One thing to keep in mind here is reflect skills that destroy projectiles will not work in this fight. They will save your allies from being killed, but they can also cause problems with reflecting the attack if placed on the boss.

Note: It’s always important to have a backup reflector for when the primary has to deal with poison, profane or has become sacrificed.

Guild Wars 2 Matthias Gabrel Raid Boss Breakdown Guide

Unstable Blood Magic

Throughout the fight, random players are targeted and inflicted with this burden. Once a player has been targeted, they need to leave the group and use their special action to drop the Unstable Blood Magic around the edge of the arena. Doing so will cause a large well of profane that pulses. Dropping this on the group can be devastating.

Guild Wars 2 Matthias Gabrel Raid Boss Breakdown Guide Guild Wars 2 Matthias Gabrel Raid Boss Breakdown Guide


This is another mechanic that’s similar to Unstable Blood Magic. A random player is given corruption. Once selected, they must make use of the fountains around the arena to clear their poison. You will need to have the mastery Forsaken Waters to use these fountains.

Groups will usual use the fountains in a clockwise rotation around the room. Starting with either fountains located closest to the door. This is group preference, some groups may do it differently.

Guild Wars 2 Matthias Gabrel Raid Boss Breakdown Guide


Throughout the fight, Matthias will target a random player and Sacrifice them. During this time, everyone with a Crowd Control skill should focus the sacrificed player. Failure to break your fellow group member free will result in their death.

Abomination: During the last 40%, sacrifice will no longer happen.

Guild Wars 2 Matthias Gabrel Raid Boss Breakdown Guide

Phase Mechanics

The following phases spawn at certain periods though the fight. The first three spawn in sequence, followed by a random sequence in the last 40%. After you enter the Abomination phase, these phases will randomly cycle in quick succession.

Snowstorm Phase (100%)

This is the first phase of four. Throughout the arena, icy patches will spawn. These patches will slow players who’re within range. Ice patches can only be cleared by burning skills. So players with these skills should focus them. Patches that are left in the arena will cause issues for players clearing corruption in the fountains.

Abomination: Icy Patches spawn at a faster rate.

Guild Wars 2 Matthias Gabrel Raid Boss Breakdown Guide

Heatwave Phase (80%)

The key to this phase is to keep moving. Standing still will apply burning. During this phase there will also be fire tornadoes that move around the arena randomly. If caught by a tornado, it will inflict burning and throw you off in a random direction. The key to this phase is to make sure you’re not taking excessive damage and stay together as a group for healing.

Abomination: There are four fire tornadoes during this phase.

Guild Wars 2 Matthias Gabrel Raid Boss Breakdown Guide

Downpour Phase (60%)

This phase has a few extra mechanics compared to the others. You will need to stand still, preferably in the center of the arena. If you move too much you will gain stacks of Unbalanced. Once 10 stacksis applied players will be knocked down for a short period. You can however remove the stacks by standing still once you hit 10. Players may want to force themselves up to 10 stacks and clear the debuff. This will stop yourself from being knocked down while trying to move out from the center.

Throughout this phase half the group will need to move away from the center of the arena. Players will have an expanding AoE that explodes when full. Players take low damage, but overlapping this AoE will down anyone it touches.

Storm Cloud

Outside the central area, a storm cloud will appear. Standing in the cloud will cause high damage and down, or even kill anyone stood within it. For this phase, you need to be mindful of its position as there will be moments where you have to move out. There will only be one ring during the first phase of this.

Abomination: Once this phase triggers while fighting the abomination, there will be two storm clouds that cover most of the arena space.

Guild Wars 2 Matthias Gabrel Raid Boss Breakdown Guide

Zealous Benediction

Every so often, Matthias will apply this to five random players. Once applied, the five players will have to spread out and not overlap their AoE rings on other players. Doing so will down them when the blast of energy happens. It’s okay to overlap the AoE circles, just make sure the edge of the rings don’t overlap the players inside them.

Abomination: This will be applied to all players during the last phase.

Guild Wars 2 Matthias Gabrel Raid Boss Breakdown Guide

Abomination (40%)

At 40% Matthias will overload from the amount of Bloodstone Magic he has absorbed. He can no longer control its power. Once the abomination spawns, he will apply “Zealous Benediction”, then kick whoever is in range and fear the group.


These phases return, along with some extra mechanics (detailed above under each phase) Unlike the earlier phases, the Abomination will cycle through the phases every 30 seconds.


Throughout the last phase of this fight, you will see summoned spirits. These spirits run from one side of the arena to the other. You want to avoid these as much as possible, standing in their AoE will cause you to down, and possibly die. Make sure you avoid the spirits by moving out-of-the-way. Dodging through them doesn’t really work. If slowed by Icy Patches, make sure to save your dodges if you need to evade the spirit.

Guild Wars 2 Matthias Gabrel Raid Boss Breakdown Guide

Spontaneous Combustion

This is very similar to the Shards of Rage attack that Matthias performs. The only difference is the shards are up into the air, and rain down on the group. It is possible to dodge this attack as you will see lots of red AoE circles on the ground. This attack deals a heavy damage, so do your best to dodge it as much as possible.

Guild Wars 2 Matthias Gabrel Raid Boss Breakdown Guide

Matthias Gabrel

Overall, Matthias doesn’t have that many attacks. The attacks he does perform inflict rather high damage if they hit the group. But most of this fight revolves around dealing with environmental mechanics.


The most common attack Matthias performs. Between each attack he will swing at the group inflicting damage. He will lunge forward and hit several players at a time. This attack deals low damage.

Oppressive Gaze

Matthias will focus on one player during the fight. If this player dies, the fixation will change to someone else. When fixated he will raise his Blood Shield and fire shards at the fixation. From this attack, he will then produce a large energy ball that he fires towards the focused player. You can side step this attack, dodge or block depending on your preference.

This attack is only present during the Snowstorm phase, and then returns during the Abomination phase. If fixated with this attack be mindful of the groups positioning to avoid killing players who’re unaware of your location.

Guild Wars 2 Matthias Gabrel Raid Boss Breakdown Guide

Shards of Rage

Between the general attacks, and the shield, Matthias will do a flip into the air smashing his staff into the ground. When this happens he will fire a ring of Blood Shards out at the group. These can be dodged, blocked or reflected. They do minimal damage if they hit, however you will gain the effect Blood Fueled. This will cause Matthias to increase 10% more damage per stack.

Guild Wars 2 Matthias Gabrel Raid Boss Breakdown Guide

Blood Shards

This attack is tied to Oppressive Gaze and the reflecting mechanic explained above. Matthias will focus one player, and fire Blood Shards at them while his Blood Shield is active. Generally whoever is fixated shouldn’t have to worry as the attack will be reflected. If reflects happen to not be placed, this attack will kill the player who is fixated if they’re hit.