This page covers healer-focused strategies for The Underrot dungeon. 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 information. I'll continue to update it as-needed.

---

---

 Bosses

Below are guides for the bosses in The Underrot, including their abilities, healer notes, and addon settings.

 Elder Leaxa

• Taking damage from any ability applies a stack of Taint of G'huun.
• Interrupt Blood Bolt to prevent the heavy damage on random players.
• Avoid the path of Creeping Rot.
• Blood Mirror creates a Blood Effigy.
  • Blood Effigies use the same abilities as Leaxa.
• On Heroic, move out of Sanguine Feast after Leaxa teleports.

 Healing Notes

• Use Cooldowns when Blood Effigies are active.
• Watch for players with high stacks of Taint of G'huun.

 Debuffs to Track

• Minor: Taint of G'huun

 Addons

Healer DBM Settings for Elder Leaxa

---

 Cragmaw the Infested

• Infested causes Cragmaw's abilities to spawn Blood Tick Larva.
  • These must be stepped on before their Metamorphosis cast finishes or they'll turn into Blood Ticks.
    • Blood Tick
      • Each attack applies a stack of Serrated Fangs.
      • Triggers Blood Burst on death, dealing light damage to all players.
• Don't be in front of Cragmaw to avoid Indigestion.
• Targets random players with Charge, knocking back any players hit.
• On Heroic, at 100% energy Tantrum deals moderate damage to all players and spawns Blood Tick Larva randomly around the room.

 Healing Notes

• Use Cooldowns on Tantrum or if too many Blood Ticks are active.

 Debuffs to Track

• Minor: Serrated Fangs

 Addons

Healer DBM Settings for Cragmaw the Infested

---

 Sporecaller Zancha

• Taking damage from any ability will apply a stack of Decaying Spores (dispel, disease).
• Avoid the Spore Pods created by Boundless Rot.
  • These must be destroyed by players affected by Upheaval or by the tank using Shockwave.
• At 100% energy, Festering Harvest detonates all Spore Pods, inflicting moderate damage to all players and applying a stack of Decaying Spores for each Spore Pod that was active.
• On Heroic, Volatile Pods causes dozens of poison orbs to travel across the room, dealing light damage to any player hit.

 Healing Notes

• Use Cooldowns on Festering Harvest.
• Watch for players with high stacks of Decaying Spores.

 Debuffs to Track

• Minor: Decaying Spores (dispel, disease)

 Addons

Healer DBM Settings for Sporecaller Zancha

---

 Unbound Abomination

• Blood Barrier converts all damage taken into Blood Energy.
  • At 100% Blood Energy, two Blood Visages are released.
    • Blood Visage
      • When killed, Fatal Link deals damage to the Unbound Abomination.
• Avoid the Vile Expulsion pools.
• Stack on the player affected by Cleansing Light to remove Putrid Blood (dispel, magic) stacks.
  • This can also be used to clear Vile Expulsion pools, but that's not as important as clearing stacks on players.
  • Dispel Putrid Blood (magic) as-needed to keep the stacks under control if any player misses the Cleansing Light.
• Titan Keeper Hezrel uses Holy Bolt and Purge Corruption to assist players in killing Blood Visages.

 Healing Notes

• Use Cooldowns if Putrid Blood stacks get too high.

 Debuffs to Track

• Major: Putrid Blood (dispel, magic)

 Addons

Healer DBM Settings for Unbound Abomination

 Trash Mobs

Below are notes for the trash mobs in The Underrot. The Underrot has a relatively linear layout. The trash below is ordered as if you're completing the bosses in the order they're listed above. Some spells don't exist in the database and will be added as soon as they're available.

Entrance thru Elder Leaxa

• Fetid Maggot
  • Don't stand in front of these when Rotten Bile is cast.
• Underrot Tick
  • Deal moderate damage to all players upon death with Blood Burst.
• Chosen Blood Matron
  • These charge random players and cast  Savage Cleave.
  • Dispel Warcry (enrage).
• Fanatical Headhunter
  • Targets random players with Barbed Spear.
  • Roots random players with Hooked Snare.
• Devout Blood Priest
  • Interrupt Gift of G'huun (dispel, purge) to prevent the immunity and increased damage dealt.
  • Interrupt Dark Reconstitution to prevent the healing.
• Befouled Spirit
  • When targeted by Dark Omen, stay at least 4-yards away from other players and be prepared to use a personal defensive cooldown.

---

Elder Leaxa thru Cragmaw the Infested

• Living Rot
  • Avoid the Wave of Decay pools.
• Feral Bloodswarmer
  • Deals light damage to all players and interrupt spell casts with Sonic Screech.
  • Fixates on players with Thirst for Blood, dealing moderate to heavy damage.
• Diseased Lasher
  • Interrupt or dispel Decaying Mind (disease) to prevent the stun and reduced healing absorption.
    • This effect can also be removed from the player by healing them for the absorption amount.
• This area also contains Fetid Maggots, detailed above.

---

Cragmaw the Infested thru Sporecaller Zancha

• Fallen Deathspeaker
  • Interrupt Raise Dead to prevent a Reanimated Guardian from being summoned.
  • Dispel Wicked Frenzy (enrage).
• Reanimated Guardian
  • Interrupt or dispel Bone Shield (purge) to prevent the damage absorption effect.
• Grotesque Horror
  • Interrupt or dispel Death Bolt (magic) to prevent the stacking damage dealt to the group.
• Bloodsworn Defiler
  • Interrupt or dispel Withering Curse (curse) to prevent the increased damage taken and reduced damage dealt debuff.
  • Interrupt Shadow Bolt Volley to prevent the damage dealt to the group.
  • Avoid standing near Spirit Drain Totems to avoid the critical damage dealt, if a player is hit and survives, dispel the Spirit Drain stun.

---

Sporecaller Zancha thru Unbound Abomination

• Faceless Corruptor
  • Don't be in front of these when they turn and cast Maddening Gaze (dispel, magic).
  • Avoid the tentacles created by Abyssal Reach.
• This area also includes Grotesque Horror, Bloodsworn Defiler, Reanimated Guardian, and Fallen Deathspeaker, as detailed above.

---

 Trash Debuffs to Track

• Major: Withering Curse (dispel, curse), Maddening Gaze (dispel, magic), Thirst for Blood, Decaying Mind (dispel, disease)
• Minor: Savage Cleave, Hooked Snare, Dark Omen, Death Bolt (dispel, magic)
• Enrages to Dispel: Warcry, Wicked Frenzy
• Buffs to Purge: Gift of G'huun, Bone Shield

---

 Trash Addons

Healer DBM Settings for Underrot Trash

---

---

 Mythic+ Notes

In this section you'll find notes about certain interactions bosses and trash mobs have with the Mythic+ difficulty increase or certain affixes that make them more troublesome than normal.

Cragmaw the Infested

• Having any Blood Ticks spawn with Fortified will deal significant damage to the tank.
• Similarly, having Blood Ticks spawn with Necrotic will rapidly apply stacks to the tank.

Sporecaller Zancha

• Even 3-4 stacks of Decaying Spores (dispel, disease) can be lethal during Tyrannical or at higher level keys.

Trash Mobs

• Underrot Tick
  • Blood Burst deals significant damage with Fortified and on higher level keys.
• Chosen Blood Matron
  • The Warcry (enrage) these apply to themselves and nearby enemies is incredibly potent with Fortified.
• Befouled Spirit
  • Dark Omen deals significant damage with Fortified or if bolstered by Bolstering.
• Feral Bloodswarmer
  • Thirst for Blood with Fortified or during Bolstering may require an external defensive cool down on the affected player if they have no cool downs of their own.

---

---

 Videos

[S4] Mythic 10, 2 Upgrade Clear, Restoration Druid PoV

Below is a video of me clearing The Underrot on Mythic 10 difficulty in time for a 2 upgrade during Season 4.

Normal Clear, Restoration Druid PoV

Below is a video of me clearing The Underrot on Normal difficulty on the Battle for Azeroth Beta.

---