Grobbulus Encounter Guide: Strategy, Abilities, Loot

Last updated on Sep 27, 2022 at 18:43 by Sinzhu 1 comment

Grobbulus is the second encounter of The Construct Quarter in Wrath of the Lich King Classic's version of the Naxxramas Raid and is commonly the eleventh encounter of the instance as a whole. Do not forget to be aware of the various Raid Buffs and Debuffs as you work to optimize your Raid Composition for this encounter's mechanics!


Overview of Grobbulus in Wrath of the Lich King Classic's Naxxramas

Grobbulus is the second boss of The Construct Quarter that you will face in Naxxramas, and will act as an important test of both positioning and patience. If all goes well, this encounter will be an easy one, but if handled poorly things will quickly spiral out of control.


Role-Specific Tips for Grobbulus


DPS Tips

  • Avoid standing in any of the Poison Cloud IconPoison Clouds spawned throughout this encounter.
  • If you are afflicted with the Mutating Injection IconMutating Injection debuff, run to a far away location that already has a nearby Poison Cloud IconPoison Cloud and either allow the debuff to expire or be dispelled.
  • If you are ranged, make sure to target the Fallout Slimes so that they are defeated quickly.

Healer Tips

  • Position yourself in the middle of the room to reduce how often you need to move.
  • Be very careful to not instinctually dispel the Mutating Injection IconMutating Injection debuff. Either wait for the player with the debuff to call for a dispel or simply let it time out on its own.

Tank Tips

  • This fight may be solo-tanked if you desire, as a second tank is only useful for handling the Fallout Slimes that occasionally spawn during this encounter.
  • You will need to slowly drag Grobbulus around the outside edge of his room, moving every time a new Poison Cloud IconPoison Cloud is created.
  • Do not move more than you have to, so that you can maximize your space in the room.
  • Make sure that Grobbulus only hits you with his frontal Slime Spray IconSlime Spray ability.

Grobbulus Abilities

  • Poison Cloud IconPoison Cloud — Grobbulus will frequently create Poison Clouds beneath his feet that grow over time. Standing in these clouds will deal heavy damage to players.
  • Mutating Injection IconMutating Injection — Grobbulus will occasionally afflict players with this debuff for 10 seconds. After this debuff expires or is dispelled a Poison Cloud IconPoison Cloud is created where the player was standing, in addition to dealing a burst of Nature damage to any players within 20 yards of the location.
  • Slime Spray IconSlime Spray — This ability is a frontal cone cast by Grobbulus, causing heavy Nature damage to any players hit. In addition, a Fallout Slime will be spawned for each player hit (a minimum of one, as the tank cannot avoid this ability).

Strategy for Grobbulus

Begin by engaging Grobbulus at the bottom of the ramp he occasionally wanders to, with ranged players and healers standing in the middle of the room. Immediately drag Grobbulus to the nearest edge of the room before gradually rotating around the outer wall as more Poison Cloud IconPoison Clouds are created. The direction you choose to move around the room does not matter, so long as everyone is aware of it.

For melee DPS and the primary tank, moving Grobbulus around the room while avoiding Poison Cloud IconPoison Clouds and Slime Spray IconSlime Spray will be the main difficulty of this fight, as it is important to not spawn any unnecessary Fallout Slimes. Any slimes that do spawn should be primarily defeated by the ranged DPS.

Finally, make sure to run sufficiently far away if you have the Mutating Injection IconMutating Injection debuff so that you do not blow up on your raid members or create an awkwardly-positioned Poison Cloud IconPoison Cloud. If done correctly, you will have plenty of space in the room still by the time Grobbulus is defeated.


Grobbulus Loot



Item Type/Slot
The Skull of Ruin Icon The Skull of Ruin Shield
Infection Repulser Icon Infection Repulser Main Hand Mace
Sealing Ring of Grobbulus Icon Sealing Ring of Grobbulus Ring
Bone-Linked Amulet Icon Bone-Linked Amulet Neck
Handgrips of Turmoil Icon Handgrips of Turmoil Cloth Gloves
Miasma Mantle Icon Miasma Mantle Cloth Shoulders
Blistered Belt of Decay Icon Blistered Belt of Decay Leather Belt
Putrescent Bands Icon Putrescent Bands Leather Wrist
Bands of Anxiety Icon Bands of Anxiety Mail Wrist
Leggings of Innumerable Barbs Icon Leggings of Innumerable Barbs Plate Legs


Item Type/Slot
Origin of Nightmares Icon Origin of Nightmares Staff
Twilight Mist Icon Twilight Mist One-Hand Dagger
Plague Igniter Icon Plague Igniter Wand
Dying Curse Icon Dying Curse Trinket
Grim Toll Icon Grim Toll Trinket
Defender's Code Icon Defender's Code Trinket
Forethought Talisman Icon Forethought Talisman Trinket
Aged Winter Cloak Icon Aged Winter Cloak Cape
Shroud of Luminosity Icon Shroud of Luminosity Cape
Cloak of the Shadowed Sun Icon Cloak of the Shadowed Sun Cape
Shawl of the Old Maid Icon Shawl of the Old Maid Cape
Cloak of Averted Crisis Icon Cloak of Averted Crisis Cape
Cowl of Vanity Icon Cowl of Vanity Cloth Helm
Sympathetic Amice Icon Sympathetic Amice Cloth Shoulders
Mantle of the Fatigued Sage Icon Mantle of the Fatigued Sage Cloth Shoulders
Tunic of Indulgence Icon Tunic of Indulgence Leather Chest
Desecrated Past Icon Desecrated Past Leather Legs
Fallout Impervious Tunic Icon Fallout Impervious Tunic Mail Chest
Spaulders of Incoherence Icon Spaulders of Incoherence Mail Shoulders
Depraved Linked Belt Icon Depraved Linked Belt Mail Belt
Slime Stream Bands Icon Slime Stream Bands Mail Wrist
Chestguard of the Exhausted Icon Chestguard of the Exhausted Plate Chest
Girdle of Chivalry Icon Girdle of Chivalry Plate Belt
Bracers of Liberation Icon Bracers of Liberation Plate Wrist

Further Reading

Grobbulus is just one of the 15 encounters present in the Naxxramas raid of Wrath of the Lich King Classic. If you would like to learn more about the others, or would like to see the loot tables of every boss at the same time, please see our other pages for the raid below.



  • 27 Sep. 2022: Page added
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