This page covers healer-focused strategies for De Other Side dungeon in Shadowlands. While it's tailored for healers, other roles may also find the information useful. If you have any suggestions or feedback, you can leave a comment below or tweet @PrestonDvorak.

This guide has been updated and maintained based on my own experiences as well as Dungeon Journal and combat log information. I'll continue to update it as-needed.

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 Bosses

Below are guides for the bosses in De Other Side, including their abilities, healer notes, and addon settings.

Hakkar the Soulflayer

• The tank will be dealing with Piercing Barb.
• Blood Barrier deals moderate damage to all players and Sons of Hakkar, granting Hakkar a damage absorption shield equal to the damage dealt and making him immune to interrupts while the shield is active.
  • Avoid the impact locations of Blood Barrage
  • Interrupt the channeled cast as soon as the damage shield is depleted.
• Stay at least 7-yards away from other players to prevent the spread of Corrupted Blood.
• Son of Hakkar will periodically join the encounter.
  • Son of Hakkar
    • Fixate on random players with Zealous.
    • Deal steadily increasing damage to all players with Blood Nova.
    • Upon death, avoid the Spilled Essence pool.
      • The pool gradually shrinks while healing the Son of Hakkar that spawned it. The Son of Hakkar will become active again at full health.
        • On Mythic, the pool no longer shrinks.

 Healing Notes

• Use cooldowns as-needed if Corrupted Blood of Sons of Hakkar gets out of hand.

 Debuffs to Track

• Major: Corrupted Blood
• Minor: Zealous

 Addons

• Useful addons will be added as they're available.

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The Manastorms

During this encounter, players will alternate between fighting a Manastorm in the arena while the other assaults from afar.

Stage One - Millhouse's Magics

During this stage, Millhouse is in the arena with Millificent on the sidelines.

• Millhouse Manastorm
  • Interrupt Frostbolt to prevent the damage dealt, especially while Chilled Heart is active.
  • Intercept the Power Overwhelming beams coming from the Power Crystals to Millhouse.
    • The player(s) intercepting the beams take steadily increasing damage over time while gaining a stacking damage dealt increase.
    • Each second the beam hits Millhouse, Overwhelming Power! deals light damage to all players and grants him a stacking damage dealt buff.
  • On Mythic, Diabolical Dooooooom! deals critical damage to all players over 15-seconds.
    • To interrupt this, Millhouse should be stunned with the Echo Finger Laser X-treme beam, detailed below.
• Millificent Manastorm
  • Targets random players with Throw Buzz-Saw, dealing moderate damage and applying a stack of Bleeding, dealing further damage over time.
  • On Mythic, when targeted by Echo Finger Laser X-treme, kite the beam over Millhouse to stun him with Eruption, interrupting Diabolical Dooooooom!.

Stage Two - Millificent's Gadgets

During this stage, Millificent is in the arena with Millhouse on the sidelines.

• Millificent Manastorm
  • The tank will be dealing with Buzz-Saw and stacks of Bleeding.
  • Dismantle Experimental Squirrel Bombs by clicking on them to prevent the moderate damage dealt to all players when they detonate.
    • Dismantling a Bomb spawns several Mechanical Bomb Squirrels that deal light damage to random players.
  • On Mythic, Aerial Rocket Chicken Barrage deals light damage to all players.
• Millhouse Manastorm
  • Targets random players with Frostbolt.
  • On Mythic, when targeted by Shadowfury, move within 8-yards of Millificent to stun her.

 Healing Notes

• The player(s) absorbing Power Overwhelming may need an external defensive cooldown to survive the damage.
• Use cooldowns as-needed if Experimental Squirrel Bombs aren't dismantled or if Bleeding stacks get too high.

 Debuffs to Track

• Major: Power Overwhelming
• Minor: Bleeding

 Addons

• Useful addons will be added as they're available.

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Dealer Xy'exa

• Avoid the locations of Displacement Traps.
  • Hitting a trap deals light damage to all players within 10-yards and teleports the triggering player 25-yards into the air.
• When affected by Localized Explosive Contrivance, run over a Displacement Trap to be teleported in the air just before the effect expires to avoid damaging all players.
  • If the affected player doesn't trigger a trap properly, all players gain a stack of Localized Explosive Contrivance, dealing light damage over time.
• Just before Explosive Contrivance finishes casting, run over a Displacement Trap to be teleported into the air to avoid the burst of damage.
  • Any player that doesn't trigger a trap properly also gains a stack of Explosive Contrivance, dealing light damage over time.
• Avoid the path of Displaced Blastwave beams from portals spawned near random players.

 Healing Notes

• Use cooldowns as-needed to make sure players have enough health to survive triggering a Displacement Trap.

 Debuffs to Track

• There are no particular debuffs to track.

 Addons

• Useful addons will be added as they're available.

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Mueh'zala

During this encounter, players alternate between the two stages as they work to free Bwonsamdi.

Stage One - The Master of Death

This stage begins the encounter and ends when Shatter Reality is cast and players travel through Deathgate. This stage begins again after 25-seconds in stage two.

• The tank will be dealing with Soulcrusher, which deals heavy damage over time from Crushed Soul.
• Dispel Cosmic Artifice (magic) and avoid the Cosmic Collapse left behind.
  • If this expires instead of being dispelled, Unbound Cosmos deals moderate damage to all players.
• Avoid the sequence of areas hit by Master of Death.
  • There are three areas that will be hit: Left, Right, and Melee (as you're facing the boss).
  • Each area will only be hit once per sequence.
  • The area to be hit is dictated by which hand Mueh'zala is casting with, if both hands are casting, the Melee area will be affected.
• If no players are within melee range, Crush deals heavy damage to all players.
  • Additionally, any players not on the same platform as Mueh'zala will have Stellar Clouds repeatedly spawned on them.
• When Shatter Reality is cast, run into one of the Deathgates spawned on either side of Mueh'zala at the edge of the platform.

Stage Two - Shattered Reality

This stage begins when players travel through the Deathgates and ends after 25-seconds. It begins again each time players travel through the Deathgates.

• Players have 25-seconds to interact with Mueh'zala's Primeval Grasp totems before Coalescing pulls them back to reality.
  • Each totem is guarded by a Shattered Visage.
    • Shattered Visage
      • Continue to dispel Cosmic Artifice (magic) just as in stage one.
      • Deals light damage to all players with Shattered Dominion.
  • Once the Shattered Visage is killed, interacting with the nearby totem triggers Mojo Infusion.
    • Deals 20% of Mueh'zala's health as damage with Bwonsamdi's Fury.
    • Grants players a stack of Bwonsamdi's Fervor, increasing haste and movement speed.

 Healing Notes

• The tank may need external defensive cooldowns to survive Crushed Soul.
• Players seem to be split into two groups depending on if they take a Deathgate on the left or right side of the boss.

 Debuffs to Track

• Major: Crushed Soul, Cosmic Artifice (dispel, magic)
• Minor: Master of Death

 Addons

• Useful addons will be added as they're available.

 Trash Mobs

Below are notes for the trash mobs in De Other Side. De Other Side has a relatively open layout with the choice of what order to clear the first three wings. The trash below is grouped based on the different wings that are available.

Central Wing

• Risen Cultist
  • Interrupt or avoid the locations of Dark Lotus.
• Risen Bonesoldier
  • Don't stand in front to avoid Trollguard.
• Risen Warlord
  • Dispel Undying Rage (enrage) to remove the increased damage dealt effect and allow the mob to be killed.
  • Avoid the locations of Reaver.
• Skeletal Raptor
  • Applies stacks of Decrepit Bite to tank, dealing light damage over time.
• Death Speaker
  • Don't stand in front when it turns to cast Erupting Darkness.
• Enraged Spirit
  • Avoid the locations of Enraged Masks.
  • Deals moderate damage over time to all players with Rage.

Hakkar the Soulflayer's Wing (Shrine of the Soulflayer)

• Atal'ai High Priest
  • Dispel Shadow Word: Pain (magic) to prevent the light damage over time.
• Atal'ai Devoted
  • Should be killed before their Devoted Sacrifice cast finishes, turning them into Son of Hakkar.
    • Son of Hakkar
      • Fixate on random players with Zealous.
      • Deal steadily increasing damage to all players with Blood Nova.
      • Upon death, avoid the Spilled Essence pool left behind.
• Atal'ai Deathwalker
  • Applies stacks of Gushing Wound to the tank, dealing light damage over time.
  • Stay at least 5-yards away to avoid Bladestorm.
  • Upon death, spawn an Atal'ai Deathwalker's Spirit that fixates on a random player, dealing moderate damage with melee attacks.
• Atal'ai Hoodoo Hexxer
  • Interrupt Healing Wave to prevent the healing.
  • Interrupt or dispel Hex (curse) to prevent the incapacitating effect.
  • Interrupt Lightning Discharge or when affected move at least 8-yards away from other players to prevent chaining the damage.

The Manastorms' Wing (The Heap)

• Defunct Dental Drill
  • Deals heavy damage over time to all players with Haywire.
• 4.RF-4.RF
  • When affected by W-00F, stay at least 8-yards away from other players.
• Headless Client
  • During Spinning Up, stay at least 5-yards away. Damaging the mob causes it to be knocked away.
• Volatile Memory
  • Stay at least 10-yards away to avoid Volatile Capacitor.
• Lubricator
  • Interrupt Self-Cleaning Cycle to prevent the healing over time.
• There is a short gauntlet players must traverse by avoiding the flow of Experimental Sludge oozes.
  • Players hit take light damage and have movement speed decreased from Icky Sticky.
• Sentient Oil
  • Deals light damage to random players with Essential Oil.
  • Targets random players with Sludgegrab, pulling them into melee range and rooting them in place.
• There is another short gauntlet players much traverse while avoiding sludge from the two sludge vents along the narrow walkway.
  • Being hit by the sludge will knock the player off the walkway.

Dealer Xy'exa's Wing (Hidden Glade)

• Avoid the impact locations of Malefic Blast being shot from the walls of the first hallway.
• Weald Shimmermoth
  • Dispel Soporific Shimmerdust (curse) to prevent the accumulation of Soporific Shimmerdust (dispel, curse) stacks.
    • Players can jump to remove stacks of Soporific Shimmerdust.
    • At 10 stacks, the affected player is put to sleep.
• Runestag Elderhorn
  • Avoid the impact locations of Anima Starstorm.
• Spriggan Barkbinder
  • Interrupt Bark Armor to prevent the damage absorption effect.
• Mythresh, Sky's Talons
  • Stay at least 5-yards away to avoid Wailing Grief (dispel, magic).
• Bladebeak Matriarch
  • Dispel Enrage (enrage) from Angering Shriek to remove the increased damage dealt effect.
• Territorial Bladebeak
  • Applies Beak Slice to the tank, increasing the damage taken from subsequent Beak Slices.
• Bladebeak Hatchling
  • Call nearby Bladebeaks to their aid with Frightened Cries.

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 Trash Debuffs to Track

• Major: 
  • Magic Dispel: Wailing Grief (dispel, magic)
  • Curse Dispel: Soporific Shimmerdust (dispel, curse), Soporific Shimmerdust (dispel, curse), Hex (dispel, curse)
  • Damaging: Beak Slice
• Minor:
  • Magic Dispel: Shadow Word: Pain (dispel, magic)
  • Damaging: Decrepit Bite, W-00F, Gushing Wound, Lightning Discharge
• Enrages to Dispel: Undying Rage, Enrage
• Buffs to Purge: None

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 Trash Addons

• Useful addons will be added as they're available.

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 Mythic+ Notes

Below are notes that pertain to high mythic+ levels and certain affixes. What constitutes a high mythic+ level will depend on your gear and group, so if you out-gear a particular mythic+ level these notes may not apply. The notes are grouped by affix but are in no particular order.

• Tyrannical
  • Mueh'zala
    • The tank will need heavy healing and external defensive cooldowns when dealing with Crushed Soul.
• Fortified
  • Enraged Spirit
    • Rage may require minor cooldowns to survive.
  • Defunct Dental Drill
    • Haywire will require major cooldowns to survive.
  • Territorial Bladebeak
    • Deal heavy damage to the tank with Beak Slice.
• Sanguine
  • Enraged Spirit
    • Will not move while channeling Rage.
  • Atal'ai Hoodoo Hexxer
    • Can be difficult to move due to their preference for casting spells. Be ready with knock backs and interrupts.
  • Defunct Dental Drill
    • Will not move while channeling Haywire.
• Bolstering
  • No exceptional interactions noted yet!
• Grievous
  • Defunct Dental Drill
    • Can cause players to gain high stacks during Haywire.
• Raging
  • Enraged Spirit
    • Must be dispelled quickly if channeling Rage.
  • Defunct Dental Drill
    • Must be dispelled quickly if channeling Haywire.

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