Uldir Boss Guides » MOTHER Guide

MOTHER is a boss in the Uldir raid in World of Warcraft. Our strategy guide will help you to defeat the MOTHER encounter and the loot listing below contains all of the loot she drops on each difficulty.


MOTHER is the second boss of Uldir, and consists of three separate phases. However, rather than transitioning at a certain percent, like most bosses, she transitions phases when she is moved from one chamber to the next. The goal is to reach the last chamber, where she takes increased damage.

Fight Basics

  • The boss encounter area consists of three chambers, each of which have an energy bar that slowly fills while the boss is in the corresponding chamber. When the energy bar reaches 100, the chamber is purged, killing all living matter within the space.
  • Each of the chambers are separated by a Defense Grid, and passing through it deals raidwide damage, which stacks until the debuff expires, and spawns an Embodiment of Contamination.
  • Depending on raid size, players should pass through one-by-one, starting with a tank and a few DPS, and ending with the other tank and a healer.
  • The Defense Grid acts as a barrier that prevents damage dealers, and healers, from casting at targets on the opposite side.

Strategies by Role

All Roles

  • Wind Tunnels will periodically open and push players towards the Purifying Flames. The direction in which the wind pushes players alternated each time.
  • After the boss enters the second chamber an Uldir Defensive Beam will periodically appear and move through the room. The safe zone will always be marked on the ground by a glowing square. This mechanic also happens in the last chamber.


  • Clinging Corruption must be interrupted to prevent the application of the periodic damage to the raid.
  • Damage dealers in the room without the boss must quickly kill the Embodiments of Corruption.
  • Major offensive cooldowns, such as Bloodlust or Heroism, should be used in the last chamber where MOTHER takes 100% increased damage due to Depleted Energy.


  • When multiple players pass through the Defense Grid there will be a large burst of raid damage.
  • If an Embodiment of Corruption is not interrupted, the whole raid will take periodic damage for 5 seconds.


  • One of the tanks will hold the boss for the entire boss fight, while the second tank will cross the Defense Grid first to hold the adds that spawn.
  • The boss should always face away from the raid before casting Sanitizing Strike, which can also be avoided by the tank.

Detailed MOTHER Strategy Guide

Created by Crzypck, officer and Raid Leader of Mist on Area 52. This guide is geared towards Heroic and Mythic, with no details about Normal difficulty. If you have any questions, please feel free to ask!

Crzypck can be reached here on MMO-C, or on Discord at Crzypck#6309. If you find this guide helpful, feel free to throw him a follow on Twitch.

Also, special thanks to Limit, the World #2 and NA #1 guild, and specifically Tagzz for consulting on the Mythic strategies!

Single Phase Encounter with Two Distinct Stages

This fight consists of three chambers that are separated by blue arcane barriers that prevent line of sight. Anytime a player passes through the barrier it deals 25k damage to everyone in the raid. If you move to a chamber further down the hallway you also spawn an add that must be tanked and killed. Coming back into a previous chamber will still cause raid damage, but will not spawn an add. The goal is to get MOTHER to the third chamber as slowly as you possibly can, as Chamber 3 has a hard "enrage" mechanic timer. If you cannot kill the boss in the 3rd chamber within a certain amount of time, it instantly the raid. However, in practice, this is very unlikely to happen.

If your raid has very good DPS, you can skip the detailed explanation and use the cheese strat.

Stages 1 & 2
  • Sanitizing Strike
    • This is a tank mechanic that can be avoided by moving behind the boss when she casts it. If you get hit it deals a moderate amount of damage and puts a debuff on you that makes subsequent hits deal 50% more damage, stacking indefinitely. The tank should make sure that the boss is not facing the raid when this ability happens.
  • Purifying Flames
    • The boss creates red swirls under your feet. These will explode with a plume of flame after a few seconds. Don't stand in them.
  • Wind Tunnel
    • Wind comes into all of the chambers on a set timer and pushes the raid towards one direction. There is a lava patch at the far side edges of each chamber. Don’t get blown into these lava patches. The raid can stack in the doorway area right near the arcane barriers and allow the wind to push you into the wall.
    • Winds alternate direction throughout the fight so try to be at the opposite end of the room when they occur.
  • Uldir Defensive Beam
    • Once the boss is in chamber 2 laser beams begin periodically passing through chambers 2 and 3 on a timer. They form a wall that has an open safe area. Just run through the open area and don't get hit by the laser.
  • Uldir Defensive Beam, 2
    • Laser beams drop from the ceiling, similar to the ones from the side. They will cover most of the area, with a line of gold swirls as a safe zone on the floor.
  • IMPORTANT: Wind and Purifying Flames can overlap.

Chamber Movement & Strategy
  • We need to slowly move the raid through each barrier. Each chamber has an energy bar starting at 0 that ticks up 1 energy every 2 seconds. When the chamber hits 100% energy, it instantly kills everyone left in that chamber with fire.
  • The goal is to move everyone as late as possible to prolong the time spent in Chamber 1 and 2.
  • One add spawns for each person passing through the barrier as well as an AoE explosion dealing 25k to the entire raid.
    • The add casts an ability called Clinging Corruption that does 17k damage to the raid plus 15k damage per second for 5 seconds.
    • These adds must be interrupted! Stuns & knock backs will also work.
    • The chamber barriers prevent line of sight, however, AoE spells and abilities can cleave to the adds through the barrier.
      • AoE Examples - Ignite, Blizzard, etc.
    • First send a group of 3 - 1 tank and 2 AoE DPS with stuns.
      • Next send 1 DPS and 1 healer.
      • After the first two groups begin sending others through in waves such as 2 DPS, 1 healer, 1 DPS, 2 DPS 1 healer, 1 dps etc.
      • The last group through is the second tank and his assigned healer.
      • In larger groups, you may need to send groups of 3. That should only be 75k damage total to everyone.
      • This last group MUST move out before the chamber energy hits 100. The boss follows its target through the barrier, activating the next chamber.
  • The rest of the fight is just rinse and repeat. You'll need to cross 2 barriers during this strategy.

The circles represent examples of where the tank can position the boss, with it facing directly into the wall and away from the barrier. It's important to note the tank WILL need to move the boss to avoid lasers.

Stage 3 - Last Chamber
  • In the last chamber the boss takes 100% increased damage.
    • Lust immediately upon the boss entering this chamber.
  • Purifying Flames continues in this phase.
  • Sanitizing Strike continues in this phase.
  • Winds continue in this phase.
  • Uldir Defensive Beams continue in this phase.
    • Chamber 3 is the same as Chamber 2.

Cheese Strategy for Heroic
  • Lust on the pull.
  • Do not send first group through the barrier for 20 seconds.
    • After 20 seconds send groups of 3 as normal.
    • The boss should be brought through the barrier as either the 3rd to last or 2nd to last group.
    • DO NOT send anyone through the 2nd barrier into chamber 3.
    • The boss should die in chamber 2.

Mythic MOTHER Abilities and Strategy Guide

  • 2 new types of adds spawn upon passing through the barriers.
  • Resistant Bacterium
    • Casts Bacterial Outbreak
      • This hits target for 36k damage if the cast finishes and also buffs all other adds to deal an additional 10% damage from all abilities
      • This does not appear to be interruptible, so kill this add ASAP.
  • Viral Contagion
    • This debuff will infect a player with a 20 second DoT called Endemic Virus, dealing 20k damage per second.
    • This can be dispelled.
    • When dispelled, it puts a DoT on all players within 10 yards, dealing 30k damage per sec for 10 seconds.
    • The player with the Contagion MUST move out of raid before being dispelled. Call out for the infected person to get out of the raid, and when they’re at about 15 yards have someone dispel them.
  • Add Management
    • Which add spawns is based on what role the player is - Resistant Bacterium spawn upon a tank passing through, Viral Contagion spawns upon a healer passing through, blobs are spawned from DPS.
    • The kill priority is Viral Contagion > Resistant Bacterium > Blobs.
  • Uldir Defensive Beams
    • Both set of lasers happen nearly simultaneously. The side beams occur slightly before the ceiling beams. Stand in the one safe zone that's open for both the side lasers and roof lasers.
    • It's extremely important for the tank holding the boss to ensure MOTHER is not facing the raid, as she always does her frontal cone during the ceiling laser.
  • Send 4 people across first - 1 tank, 2 DPS, 1 healer
    • At least one, if not both, the first 2 DPS across should have an AoE stun, and use them one after the other. They should blow cooldowns and melt the first set of 4 adds.
      • About 5 seconds after group 1 crosses, send the next 2 DPS over as well, followed by the group 2 healer when the raid is stable
      • For example, you can send a Blood DK, MW Monk, Havoc DH, and Enhancement Shaman. All of the non-tank players have an AoE stun, and this group also has 3 interrupts. Other great candidates for the first group are Frost DK or DPS warrior for their burst AoE potential.
      • It's important to keep in mind that 4 people crossing at once on Mythic deals about 130k damage to the whole raid. You'll want a healing CD here, preferably a damage reduction one like Barrier.
      • Once you're healed up from the initial group, it is very helpful to send over 2 more DPS asap, such as a Frost Mage and Balance Druid. A Mage has good burst AoE and Balance Druids have an AoE silence
    • Send 3 players each after this group.
    • Move the boss through last.
      • The last group should consist of the boss tank, the last healer, and the last 2 DPS.
      • As an example, my guild found our best group for this position was a Monk tank due to how strong they are against physical damage, a Holy Paladin as they're excellent tank healers, and our two Retribution Paladins because they have very good single target damage.
      • You'll also want some raid cooldowns assigned here as 4 people coming across deals a massive amount of damage, plus you'll spawn 4 adds AND have laser beams in a short time frame.
    • Each time a Viral Contagion or Resistant bacterium spawns, use an AoE stun while you burn them to prevent or minimize the number of debuffs that go out.
  • Blood Lust as soon as you enter chamber 3 with the boss.

Mythic Tips
  • There are essentially only three ways to wipe on this fight.
  1. If too many people cross the barrier at once, the damage will blow up the raid and kill people.
  2. If the Viral Contagion debuff gets off and is dispelled while the player is still in the group, it will spread it to everyone and kill them.
  3. If the adds do not get interrupted, the damage will wipe the raid.
  • Of these, #3 is by far the most frequent issue. While blobs are lowest on kill priority, they're #1 on interrupt priority. If a single cast is let through, you'll almost certainly lose people, and have a very high probability of wiping. If you manage to recover, you'll be behind on sending groups through, setting you back significantly.
  • If 2 casts get through, it's essentially a guaranteed wipe.
  • You need to have specific assignments for interrupts and AoE stuns. Havoc DH, any monks, warlocks, shamans etc with AoE stuns are extremely valuable, and these should be rotated.
  • Have one person from group 1 be assigned to mark 1 blob with skull, and have an assigned interrupter for the Skull blob and the non-skull blob.
  • Expect this to take several pulls to get used to the stuns and interrupt rotations. Once you get it figured out, you'll be well on your way to killing this boss

Mythic Kill Video
Thanks to Limit for the Mythic kill video!

MOTHER Encounter Journal

Originally Posted by MMO-Champion
Uldir's titanic watcher was gifted with tenacity and an insatiable desire to discover a "solution" to the Old Gods. Her protocols have remained fully intact, even though many other systems in her facility have collapsed. WARNING: M.O.T.H.E.R. will not accept aid from contaminated subjects.

  • Overview - Pass through Defense Grids to reach the final chamber of the Hall of Sanitation.

    Reaching the third and final chamber cleanses the raid of all corruption, and inflicts MOTHER with Depleted Energy.

    When MOTHER is first active in any chamber she will begin a countdown to activate Cleansing Purge within that chamber.
    • Tanks -
      • Coordinate with your allies to pass through the Defense Grids.
      • Coordinate with the other tank to maintain as few stacks of Sanitizing Strike as possible.
      • Round up Remnants of Corruption to keep them from attacking your allies.
    • Healers -
      • Coordinate with your allies to pass through the Defense Grids.
      • Avoid standing in front of MOTHER so as not to take damage from Sanitizing Strike.
      • Allies will take significant damage when passing through the Defense Grids.
    • Damage Dealers -
  • Defense Grid - Passing through a Defense Grid inflicts 20 Arcane damage to all players.
    Additionally, an Embodiment of Contamination is summoned after 3 sec.
    • Embodiments of Contamination -
      • Remnant of Corruption -
        • Clinging Corruption - Spreads a vile, clinging corruption to players within 300 yds, inflicting 4,285 Nature damage and an additional 3,570 Nature damage every 1 sec for 5 sec.
      • Resistant Bacterium -
        • Bacterial Outbreak - A violent outbreak of corruption bursts from the caster, inflicting 20 Shadow damage to their target.
          Additionally, other Embodiments of Contamination inflict 10% more damage. This effect stacks.
      • Viral Contagion -
        • Endemic Virus - Infects a player with viral infection, inflicting 12 Shadow damage every 1 sec for 20 sec.
          When this effect is removed, it causes an outbreak of Spreading Epidemic.
          • Spreading Epidemic - The infection spreads from its host, causing all players within 10 yards to be inflicted with 18 Shadow damage every 1 sec for 8 sec.
      • Remnant of Corruption -
        • Clinging Corruption - Spreads a vile, clinging corruption to players within 300 yds, inflicting 4,285 Nature damage and an additional 3,570 Nature damage every 1 sec for 5 sec.
    • Depleted Energy - Having expended immense energy cleansing the chambers of corruption, MOTHER takes 100% more damage while within the final room.
  • Cleansing Purge - Upon entering a room, MOTHER begins a countdown to performing a full cleansing purge of all living matter within the space.
    Once the room has been purged it inflicts 100 Fire damage every 1 sec to players within.
  • Sanitizing Strike - MOTHER inflicts 70 Fire damage in a cone in front of her.
    Injured targets take 50% increased damage from Sanitizing Strike for 30 sec. This effect stacks.
  • Purifying Flame - Vents within the chamber unleash jets of purifying flame, each inflicting 30 Fire damage to all enemies within 3 yards.
  • Wind Tunnel - Massive air vents throughout the chamber open, moving players towards jets of Purifying Flame.
  • Uldir Defensive Beam - Focused beams of energy project from the arena, inflicting 50 Arcane damage every 0.5 sec to players within.

MOTHER Achievements

Mythic: MOTHERDefeat MOTHER in Uldir on Mythic difficulty.
Parental ControlsDefeat MOTHER in Uldir after entering her secret passcode on Normal difficulty or higher.

MOTHER Loot List

MOTHER drops item level 340 (LFR), 355 (Normal), 370 (Heroic), 385 (Mythic) loot. Loot can have higher item levels if it becomes Titanforged or Warforged.

Level Type Slot Name Model Viewer
Type Slot Name
340FingerFingerRot-Scour Ring
340Off HandOff HandUldir Subject Manifest
340ClothLegsLeggings of Lingering Infestation
340LeatherLegsPathogenic Legwraps
340MailShouldersFlame-Sterilized Spaulders
340MailHandsGloves of Involuntary Amputation
340PlateHeadGridrunner Galea
340PlateWaistDecontaminator's Greatbelt
340One-handed MaceOne HandMother's Twin Gaze
340WarglaivesOne HandGlaive of the Keepers
340DaggerOne HandLatticework Scalpel
Level Type Slot Name Model Viewer
Type Slot Name
355FingerFingerRot-Scour Ring
355Off HandOff HandUldir Subject Manifest
355ClothLegsLeggings of Lingering Infestation
355LeatherLegsPathogenic Legwraps
355MailShouldersFlame-Sterilized Spaulders
355MailHandsGloves of Involuntary Amputation
355PlateHeadGridrunner Galea
355PlateWaistDecontaminator's Greatbelt
355One-handed MaceOne HandMother's Twin Gaze
355WarglaivesOne HandGlaive of the Keepers
355DaggerOne HandLatticework Scalpel
Level Type Slot Name Model Viewer
Type Slot Name
370FingerFingerRot-Scour Ring
370Off HandOff HandUldir Subject Manifest
370ClothLegsLeggings of Lingering Infestation
370LeatherLegsPathogenic Legwraps
370MailShouldersFlame-Sterilized Spaulders
370MailHandsGloves of Involuntary Amputation
370PlateHeadGridrunner Galea
370PlateWaistDecontaminator's Greatbelt
370One-handed MaceOne HandMother's Twin Gaze
370WarglaivesOne HandGlaive of the Keepers
370DaggerOne HandLatticework Scalpel
Level Type Slot Name Model Viewer
Type Slot Name
385FingerFingerRot-Scour Ring
385Off HandOff HandUldir Subject Manifest
385ClothLegsLeggings of Lingering Infestation
385LeatherLegsPathogenic Legwraps
385MailShouldersFlame-Sterilized Spaulders
385MailHandsGloves of Involuntary Amputation
385PlateHeadGridrunner Galea
385PlateWaistDecontaminator's Greatbelt
385One-handed MaceOne HandMother's Twin Gaze
385WarglaivesOne HandGlaive of the Keepers
385DaggerOne HandLatticework Scalpel

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