The Emerald Nightmare

Nythendra

Nythendra's [Infested Breath] unleashes great gouts of insects and corruption, consuming 50 Energy. When Nythendra's Energy is depleted, she collapses to the ground and [Heart of the Swarm] begins. Once she is fully recharged, her form coalesces and she resumes her attack.

• Damage Dealers: Stay away from your allies while afflicted with [Rot].
• Damage Dealers: Quickly run out of [Infested Breath].
• Damage Dealers: Do not stand near insects during [Heart of the Swarm].
• Damage Dealers: Stay away from your allies while afflicted with [Rot].
• Damage Dealers: Quickly run out of [Infested Breath].
• Damage Dealers: Do not stand near insects during [Heart of the Swarm].
• Damage Dealers: Quickly damage allies aflicted with [Infested Mind] to free them.
• Healers: Stay away from your allies while afflicted with [Rot].
• Healers: Quickly run out of [Infested Breath].
• Healers: Do not stand near insects during [Heart of the Swarm].
• Tanks: Move away from others while afflicted with [Volatile Rot].
• Tanks: Quickly run out of [Infested Breath].
• Tanks: Do not stand near insects during [Heart of the Swarm].

Il'gynoth, Heart of Corruption

• Il'gynoth
• Nightmare Horror
• Corruptor Tentacle
• The Eye of Il'gynoth
• Nightmare Ichor
• Deathglare Tentacle

Players begin the encounter fighting against Il'gynoth's erupting eyestalks and tentacles, while the monstrous Eye bars the way to the heart of the tree. Defeating these tentacles spawns animated Nightmare Ichor globules, which players can destroy near the Eye to damage it. Once the Eye is defeated, players can enter the hollow to damage Il'gynoth directly for a time, after which the Eye reforms to seal the entrance to the hollow once more, killing any players who remain inside. This repeats until players defeat Il'gynoth.

• Tanks: Dominator Tentacles' [Nightmarish Fury] and Nightmare Horrors' [Eye of Fate] deal heavy damage.
• Tanks: Nightmare Horrors create pools of [Nightmare Corruption] - move them to minimize the damage dealt.
• Tanks: Avoid players targeted by [Ground Slam].
• Healers: Dominator Tentacles' [Nightmarish Fury] and Nightmare Horrors' [Eye of Fate] deal heavy damage to Tanks.
• Healers: Dispel [Touch of Corruption].
• Healers: Lure Nightmare Ichors that are fixated on you to the Eye of Il'gynoth when they are low on health.
• Healers: Move away from the raid when affected by [Spew Corruption].
• Damage Dealers: Move away from the raid when affected by [Spew Corruption].
• Damage Dealers: Interrupt Deathglare Tentacles' [Mind Flay].
• Damage Dealers: Lure Nightmare Ichors that are fixated on you to the Eye of Il'gynoth when they are low on health, and wait to kill them until they are in range of the Eye.
• Damage Dealers: Avoid players targeted by [Ground Slam], and move away from other players when targeted by it.

Elerethe Renferal

• Elerethe Renferal
• Spider Form
• Roc Form
• Surging Egg Sacs
• Skittering Spiderling

As the fight progresses, Elerethe swaps between the nightmarish forms of a spider and a roc. When she takes to the skies as a roc, she moves to a different platform, forcing players to weather her [Dark Storm] as they make their way towards her.

• Damage Dealers: During Spider form, stand apart from the raid during [Necrotic Venom] to place venomous pools.
• Damage Dealers: During Roc form, place [Twisting Shadows] away from the raid.
• Damage Dealers: Kill Venomous Spiderlings.
• Healers: During Spider form, heal allies connected by [Web of Pain].
• Healers: During Roc form, the raid takes ramping damage from [Dark Storm] until they reach the eye of the storm.
• Tanks: During Spider form, take turns tanking Spiderlings to manage applications of [Dripping Fangs].
• Tanks: During Roc form, quickly taunt Elerethe after [Raking Talons].
• Tanks: During Roc form, pick up a [Shimmering Feather] to speed your way across the webbing.
• Tanks: During Spider form, take turns tanking Spiderlings to manage applications of [Dripping Fangs].
• Tanks: During Roc form, quickly taunt Elerethe after [Raking Talons].
• Tanks: During Roc form, pick up a [Shimmering Feather] to speed your way across the webbing.
• Tanks: Keep Venomous Spiderlings away from the boss or they will grant her stacks of [Swarm].

Ursoc

Ursoc tramples his enemies with [Barreling Impact] and periodically roars for a [Roaring Cacophany].

• Damage Dealers: When not afflicted with [Momentum], stand in Ursoc's path when he uses [Focused Gaze] to reduce the amount of damage [Barreling Impact] inflicts.
• Damage Dealers: Get as far away from Ursoc as possible when the target of [Focused Gaze] to reduce the damage taken from [Trampling Slam].
• Healers: When not afflicted with [Momentum], stand in Ursoc's path when he uses [Focused Gaze] to reduce the amount of damage [Barreling Impact] inflicts.
• Healers: Get as far away from Ursoc as possible when the target of [Focused Gaze] to reduce the damage taken from [Trampling Slam].
• Tanks: Ensure that no tank overlaps the effects of both [Overwhelm] and [Rend Flesh] at the same time, taunting when necessary.
• Tanks: Switch off which tank holds Ursoc's attention for [Overwhelm] and [Rend Flesh] each time he charges.
• Tanks: Stay out of the proximity of Nightmare Images to avoid [Nightmarish Cacophany].
• Tanks: Ensure that no tank overlaps the effects of both [Overwhelm] and [Rend Flesh] at the same time, taunting when necessary.
• Tanks: Switch off which tank holds Ursoc's attention for [Overwhelm] and [Rend Flesh] each time he charges.

Dragons of Nightmare

• Ysondre
• Emeriss
• Lethon
• Dread Horror
• Essence of Corruption

Ysondre shares health with Emeriss, Lethon, and Taerar. She begins the fight alongside the nightmare of one of her former cohorts. When Ysondre reaches 70% health remaining, the nightmare takes to the skies and a new one emerges from a nearby portal. Upon reaching 40% health remaining, the nightmare dragon in the air lands and the one on the ground takes to the air.

• Damage Dealers: Be sure to switch targets to prevent [Slumbering Nightmare] from triggering.
• Damage Dealers: Try not to stand directly behind the dragons so as to not be struck by [Tail Lash].
• Damage Dealers: Stand within the [Nightmare Bloom] to prevent Dread Horrors from spawning.
• Healers: Be sure to switch targets to prevent [Slumbering Nightmare] from triggering.
• Healers: Quickly dispel [Defiled Vines] from allies so that they can escape the resulting [Defiled Eruption].
• Healers: Stand within the [Nightmare Bloom] to prevent Dread Horrors from spawning.
• Tanks: Be sure to switch targets to prevent [Slumbering Nightmare] from triggering.
• Tanks: Face the dragons away allies so they don't get hit by [Corrupted Breath].

Cenarius

• Cenarius
• Malfurion Stormrage
• Corrupted Wisp
• Nightmare Ancient

The fallen Cenarius periodically creates Nightmare Seeds, which germinate for a short duration and then summon an Ally of Nightmare that must be defeated. Malfurion aids in the battle and cleanses the Nightmare Seed with the largest number of nearby players, purifying that Ally so that it instead helps the raid.

• Damage Dealers: Interrupt [Twisted Touch of Life] cast by the Twisted Sister.
• Damage Dealers: Defeat the Rotten Drakes before [Nightmare Buffet] becomes lethal.
• Damage Dealers: Use Malfurion's [Cleansed Ground] to avoid damage from [Creeping Nightmares].
• Damage Dealers: Malfurion's [Cleansed Ground] fully clears stacks of [Creeping Nightmares] from any players near the chosen target.
• Healers: The Nightmare Drake's [Nightmare Buffet] deals heavy raid damage.
• Healers: Use Malfurion's [Cleansed Ground] to avoid damage from [Creeping Nightmares].
• Healers: Malfurion's [Cleansed Ground] fully clears stacks of [Creeping Nightmares] from any players near the chosen target.
• Tanks: Be mindful of [Dread Thorns] when positioning Cenarius.
• Tanks: Be quick to grab the attention of Forces of Nightmare as they spawn.
• Tanks: Use Malfurion's [Cleansed Ground] to avoid damage from [Creeping Nightmares].
• Tanks: Malfurion's [Cleansed Ground] fully clears stacks of [Creeping Nightmares] from any players near the chosen target.

Xavius

• Xavius
• Corruption Horror
• Inconceivable Horrors
• Dread Abomination
• Lurking Terror
• Inconceivable Horror

Most of Nightmare Lord Xavius's attacks inflict Corruption on their victims. As a player gains more Corruption, they become increasingly vulnerable to the power of the Nightmare, eventually losing control entirely and turning against their friends at maximum Corruption. Players' only hope lies in the power of Ysera, who puts many of them into a deep slumber and forms a [Dream Simulacrum] of those players. When their Simulacrum perishes, the affected player will awaken, as any Corruption gained by their Simulacrum dissipates harmlessly.

• Damage Dealers: Players affected by [Dream Simulacrum] should protect non-dreaming players by handling any abilities that spread Corruption.
• Damage Dealers: Defeat Inconceivable Horrors before they can get close enough to cast [Dark Ruination] on Xavius.
• Damage Dealers: Absorb [Tainted Discharge] before it can reform back into Inconceivable Horrors.
• Healers: Players affected by [Dream Simulacrum] should protect non-dreaming players by handling any abilities that spread corruption.
• Healers: Dispel [Darkening Soul] and [Blackening Soul] as sparingly as possible to manage the amount of Corruption you gain.
• Healers: Absorb [Tainted Discharge] before it can reform back into Inconceivable Horrors.
• Tanks: Players affected by [Dream Simulacrum] should protect non-dreaming players by handling any abilities that spread corruption.
• Tanks: Move away from others when [Darkening Soul] and [Blackening Soul] is about to be dispelled from you.
• Tanks: Quickly pick up Corruption Horrors when [Manifest Corruption] is cast.
• Tanks: Absorb [Tainted Discharge] before it can reform back into Inconceivable Horrors.