Grobbulus - Naxxramas boss guide

Tactics for Grobbulus in Naxxramas 10/25 for WoW 3.3.5a: poisonous clouds, Mutagenic injection, kite along the wall, Muddy slimes and full loot.

Naxxramas
10N25N
⏱ Berserk: Berserk: 12 minutes in 10, 9 minutes in 25 (confirmed by server script)

Review

Grobbulus is a fleshy giant, the second boss of the Abomination quarter after Patchwork, who patrols the hall and ramp before the pool. The battle is all about positioning: the tank slowly moves the boss along the outer wall, leaving behind growing poisonous clouds, the raid moves parallel in the center. Players with Mutagenic Injection take their cloud to the wall, Range finishes off the Muddy Slimes. He screwed up the arrangement of the clouds - he filled the whole hall with slime and caught a wipe.

10 Normal2 928 450
General tips
  • Pool - at the bottom of the ramp along which the boss patrols; then immediately drag him to the nearest wall.
  • The main rule of the raid: we place the clouds compactly, along the wall and next to the previous ones - the space in the hall runs out faster than the boss’s HP.
  • The mutagenic injection is NOT dispelled instinctively: an explosion and a cloud appear both when dispelled and after 10 seconds - removed only when the player runs away.
  • Outside of battle, Grobbulus periodically spawns Slime from the sewer at the entrance to the wing - after the wipe, return to the boss in a group, not one at a time.
  • The wild nature aspect of the hunt (nature resist) makes life much easier for healers - almost all damage in battle is natural.

Combat phases

Phase 1 Phase 1 - Wall Carousel 100–30% HP

The boss moves in a circle along the outer wall of the hall, leaving clouds every 15 seconds.Mutagenic injections They fly in rarely (at 100% HP - about once every 18 sec), the raid calmly carries them to the wall. The task is to move economically and not clog the center of the hall.

  • Poison Cloud (Poison Cloud)
  • Mutagenic injection (Mutating Injection)
  • Slime Splashes (Slime Spray)
Phase 2 Phase 2 - Injection Hell ~30% HP and below

The frequency of injections increases as the boss's HP drops (according to the script, interval = 6 sec + 0.12 sec × current % HP): by 30% they fly almost twice as often, by the end - every ~6–7 sec. Constantly 2-4 people are switched off from the fight while jogging. There is no trick - burst the boss with all CDs and continue placing clouds carefully.

  • RapidMutagenic injections
  • Lack of free space
  • Burst with all cooldowns

Abilities

Poison Cloud
Raid damage
Every 15 seconds, the boss leaves behind a poisonous cloud that grows to about 15 meters in 60 seconds (in the tooltip it grows for 1.25 minutes) and deals heavy periodic nature damage to everyone inside.
Action: The tank moves the boss along the wall as soon as the cloud appears (hint: the boss's left hand flashes green). The rest simply don't stand in green.
Mutagenic injection
Debuff
Disease on a random player for 10 seconds. After the OR expires, a Mutagenic Explosion is triggered during dispel, and the same poisonous cloud as the boss's appears in the player's place. The frequency increases as the boss's HP drops: from ~18 sec at 100% to ~6–7 sec at the end of the battle.
Action: With a thrust - run behind the raid to the wall, to the tail of the already lying clouds (approximately where the boss was 10 seconds ago), explode there and jump out of the cloud. Dispel - only by calling when the player is on the spot.
Mutagenic Explosion
Raid damage
Thrust Explosion: 9,500–10,500 Nature damage in an area around the wearer. It is compressed automatically upon completion or dispel of the Mutagenic injection.
Action: Heels keep the carrier of the shot at the top in terms of HP until the explosion and pick him up with hots after.
Slime Splashes
Tank
Every ~20 sec frontal cone on the current target: 6,300–7,700 nature damage to everyone in front of the boss. Each affected player summons an add - Fallout Slime, which runs to the range and heals.
Action: The boss always faces only the tank, the miles hit strictly from the side/behind. The spawned slimes are picked up by the off-tank, and the range quickly explodes them.
Berserk
Berserk
After 12 minutes of battle in 10 and 9 minutes in 25: all damage +500%, attack and movement speed +150%, immunity to taunts - wipe. The timer is very forgiving, you can only hit it with completely dead DPS.
Action: Don’t delay: DPS should not die on runs and clouds, then the timer is not a problem.

Positioning

The pool is at the bottom of the ramp, then the boss drives around the perimeter of the hall along the outer wall (any direction, but one for the entire battle). Clouds from the boss and from the injections fall in a compact chain along the wall - the center of the hall remains clear. By the time of the full circle, the first clouds have already dissipated.

🛡 Tank
The main tank moves back along the wall with its back forward, moving with each new cloud, keeping the boss away from the raid with its muzzle. It is necessary to move minimally - space is more valuable than speed. The off-tank (1 in 10, up to 2 in 25) picks up the Muddy Slimes and moves them away from the healers.
✨ Healer
Heels in the center of the hall, in short dashes parallel to the tank - so run closer with an injection. One on the main tank, the rest on the raid and injection carriers; Schedule replacements in advance in case the healer gets an injection.
⚔DD
Range and healers are in the center, stay close together and don’t stretch out behind the boss (if you’re stabbed, you’ll have to run miles through the entire raid). Miles - to the side/behind of the boss, not a step into the frontal cone. Slimes are the range's priority target.

Role Tips

🛡 Tips for the tank
  • The boss can be tanked solo - a second tank is only needed for the slimes.
  • Watch the boss's left hand: green glow = new cloud, time to move. Don't run - step to the side and stop.
  • Never turn the boss towards a raid: one spray on the crowd = a pack of slimes and an almost guaranteed wipe.
  • If you catch a hit on the main tank, the off-tank intercepts the boss, and you drop a cloud at the nearest wall between the clouds in the chain.
✨ Tips for healer
  • Bind Cure Disease instead of Abolish Disease - auto-dispel every 5 seconds will remove the injection ahead of time right in the raid.
  • Dispel a shot - only when called by a player who has already reached the drop point.
  • Before the explosion, we drown the carrier of the injection to full and hang hots/shield - an explosion of ~10k plus a possible tick of the cloud.
  • Holi-palam with Purity of Thoughts has 5 seconds left to react instead of 10 - react instantly.
⚔ DD Tips
  • Muddy slimes are the range's priority: tenacious slimes gradually grind down healers.
  • With a thrust, run to the tail of the chain of clouds, to the wall, at least 30–40 m from the raid; back - a different route, so as not to collide with the next carrier.
  • Hiro/CD - after 30%, when shots fly in bursts and DPS sags due to runs.
  • Don't let pets and elementals attack the boss: a taunt from an elemental will turn the boss around and flood the raid with spray.

Loot

SlotItemClassesNote
Shield Destruction Skull Shield WarriorPaladin 10. Tank shield: strength, stamina, block, defense.
Weapons Infection Reflector PriestPaladinShamanDruid 10. Crushing right hand for casters/healers: 408 SP, haste, mp5.
Ring Signet Ring of Grobbulus RogueHunterShamanDruid 10. Agility, crit, haste, AP - physical dps.
Necklace Amulet of linked bones PriestPaladinShamanDruid 10. Int, spirit, crit, SP - healers and casters.
Hands Wargloves of Confusion PriestMageWarlock 10. Fabric: stamina, int, haste, SP, yellow socket.
Shoulders Mantle of Noxious Vapors PriestMageWarlock 10. Fabric: int, spirit, crit, SP - heal-priest is a priority.
Belt Bubbling Belt of Decay RogueDruid 10. Skin, physical dps: 66 agility, haste, AP, ArP-use.
Wrists Putrid Bands Druid 10. Skin, heal: int, spirit, haste, SP.
Wrists Alarm Handles HunterShaman 10. Chain mail, physical dps: agility, crit, accuracy, AP.
Legs Leggings of Countless Thorns WarriorPaladinDeath Knight 10. Plate, physical dps: strength, crit, a lot of haste, 2 sockets.
Weapons Source of nightmares Druid 25. Feral Tank Staff: 100 agility, 150 stamina, +2086 AP in forms.
Weapons Foggy Twilight RogueHunter 25. Dagger 1.80: agility, accuracy, haste, AP.
Weapons Plaguebringer PriestMageWarlock 25. Rod (darkness): int, spirit, crit, SP.
Accessory Vanishing Curse PriestMageWarlockShamanDruid 25. 71 accuracy + proc 765 SP for 10 sec - BiS trinket of DPS casters of the entire first tier.
Accessory Gloomy Chime WarriorRogueHunterDeath Knight 25. 83 accuracy + proc 612 armor penetration - top physical dps trinket at the start.
Accessory Defender Code WarriorPaladinDeath KnightDruid 25. 850 armor + yuz 455 evasion for 20 sec - a strong tank save trinket.
Accessory Talisman of Foresight PriestPaladinShamanDruid 25. 111 SP + hota proc for 3572 hp - Hilian trinket.
Back Old winter coat RogueHunterShamanDruid 25. Cloak physical dps: agility, crit, AP, AP.
Back Cape of Glitter PriestPaladinShamanDruid 25. Caster/healer cloak: int, crit, haste, SP.
Back Cloak of the Darkened Sun WarriorPaladinDeath Knight 25. Tank Cloak: bonus armor, strength, stamina, defense, evasion.
Back Old Maid's Shawl PriestPaladinShamanDruid 25. Hilsky cloak: int, spirit, crit, SP.
Back Cloak of Disaster Averted PriestPaladinShamanDruid 25. Hilsky cloak: int, crit, SP, mp5.
Head Cowl of Vanity PriestMageWarlock 25. Fabric, healing: int, a lot of spirit, haste, meta and red sockets.
Shoulders Amice of Sympathy Priest 25. Fabric, heal: int, crit, SP, mp5.
Shoulders Mantle of the Weary Sage PriestMageWarlock 25. Fabric: spirit, accuracy, SP - option for shadow priest/lock.
Chest Tunic of Permissiveness RogueDruid 25. Skin, physical dps: agility, crit, accuracy, AP, 2 sockets.
Legs The Tainted Past Druid 25. Skin, healing: int, a lot of spirit, crit, SP.
Chest Dirt-resistant uniform Shaman 25. Chain mail, caster: int, crit, haste, SP, 2 sockets - Elem Shaman.
Shoulders Spaulders of Incoherence Shaman 25. Chainmail, heal: int, crit, SP, mp5 - restaurant shaman.
Belt Broken Riveted Belt HunterShaman 25. Chain mail, physical dps: 74 agility, crit, haste, AP.
Wrists Slime Stream Bands HunterShaman 25. Chain mail, physical dps: agility, crit, accuracy, AP, blue socket.
Chest Chestguard of the Weary WarriorPaladinDeath Knight 25. Plate, tank: strength, 126 stamina, block, defense, parry, 2 sockets.
Belt Belt of Knightly Deeds WarriorPaladinDeath Knight 25. Plate, physical dps: strength, accuracy, haste, red socket.
Wrists Bracers of Freedom Paladin 25. Plate, heal: int, crit, haste, SP - holi-pal.