N'zoth the Corruptor - Ny'alotha Raid Strategy Guide

By FatbossTV Updated: 2020/06/18

PsychusCarapace of N'ZothN'Zoth the Corruptor Loot

Devastation's Hour - The weapon always comes with the Twilight Devastation corruption effect, which increases your character's corruption by 75.

Manifesto of Madness - The radius scales based on the power of your Legendary Cloak

Encrypted Ny'alothan Text - needed for the Azerite Essence The Formless Void

Lingering Psychic Shell - The damage reduction scales based on the amount of Corruption Resistance on your Legendary Cloak

Last Vestige of Neltharion

Visage of Nightmarish Machinations

Pauldrons of the Great Convergence

Dominion, Lurker Beyond Dreams

Greathelm of Phantasmic Reality

Ring of Cosmic Potential

Eye of Corruption - Battle Pet

Ny'alotha Allseer - Mythic Only Mount

Uncorrupted Voidwing - Ahead of the Curve Mount, rewarded from Lost Flight

- Title from Mythic: N'Zoth the Corruptor

N'Zoth Loot GuideN'zoth the Corruptor Quick Tips

Players need to avoid letting their Sanity drop to 0, as otherwise they'll become a permanently charmed Servant of N'Zoth.

Players who become Servants of N'zoth should be interrupted and killed as soon as possible.

Players can use their Azeroth's Radiance extra action button to regain Sanity.

Tank Psychus near Exposed Synapses so that he gains a 50% damage increase via Synaptic Shock when they die.

DPS should focus their damage on the Exposed Synapses until the boss has at least 5 stacks of Synaptic Shock.

Move Psychus along the edge of the room to place the Anguish zones in ideal locations.

All players should attempt to stay spread 5 yards to minimise incoming damage from the Probe Mind.

Move back to your floating body when Psychus dies and click on it to leave the Mind Realm before Collapsing Mindscape triggers.

Kill Psychus before he gains full energy and casts Manifest Madness!

Damage the boss whilst its afflicted with Shattered Ego.

Damage the Corrupted Neurons to clear a path between the boss and the wall.

Either stand next to the boss or next to the edge of the room when Mindgrasp is being cast.

Spread out before Paranoia. Let the paired players stand on top of one another whilst avoiding all other players.

Tank the Basher Tentacles. DPS should focus on killing these first.

Interrupt the Corrupted Minds. Dispel any Corrupted Mind debuffs that accidentally go through.

Kill the Spike Tentacles as the lowest priority, mainly via multi-dotting and long range cleave.

All tentacles explode with Corrupted Viscera when they die. Make sure to avoid the landing locations!

Send half of the raid into the Mindgate so that they can counter the Mind Realm mechanics. This has to be different players each time on heroic.

During the first Mind Realm in phase two, dodge the red swirly Flames of Insanity circles.

During the second Mind Realm in phase two, avoid excessive movement when afflicted with Tread Lightly.

Continue to deal with Paranoia and Mindgrasp in the same way as phase two.

The entire raid should stack their Anguish pools on a single point when Evoke Anguish expires.

The raid should move around the room each time the Anguish pools grow too close.

Avoid the Stupefying Glare beam cast.

Have several high Sanity players soak the Harvest Thoughts cast by the Thought Harvester add.

Kill the Thought Harvester add as soon as possible!

N'Zoth General Mechanic - SanitySanity

Players start the encounter with 100 sanity which is shown in an extra resource bar.

Sanity will be drained throughout the fight through various mechanics.

Upon reaching 0 sanity, a player will receive the Gift of N'Zoth debuff which increases their damage and healing done by 100% for 20 seconds.

After these 20 seconds the player will be permanently charmed and become a Servant of N'Zoth.

Whilst charmed the player will cast Mental Decay which removes 15 sanity from a random target and applies a 12 second dot.

Players should avoid loosing sanity at all times throughout the fight, as becoming a Servant of N'Zoth leads to a certain death.

Any player who accidentally becomes a Servant of N'Zoth should be interrupted and killed as soon as possible, to reduce the number of Mental Decay casts they can execute.

Use the Azeroth's Radiance extra action button to restore your Sanity!

Azeroth's RadianceAzeroth's Radiance

Using this ability will cause the player to channel for 4 seconds, granting them 20 sanity instantly and an additional 20 sanity per second.

This ability is the only way players can gain Sanity during this encounter, therefor it should be used sparingly.

All players should use the Azeroth's Radiance just before each Mindgate in phase two and whenever they drop low in phase three.

Once used, the ability goes on a 3 minute cooldown. Players channelling should not attack or move, as otherwise this will interrupt the spell.

Phase One Mind Realm

The raid needs to leave the Mind Realm to start phase two, which is done by defeating Psychus.

When Psychus dies, players can return to their floating bodies and click on them to return to the normal realm.

Players bodies are always found at the location that they entered the mind realm from.

All players are immediately placed into the Mind Realm at the beginning of the fight!

Psychus MindwrackPsychusMindwrack

This also increases all physical damage taken by 33% for 14 seconds.

Mindwrack is interruptible and should be interrupted as often as possible as to minimise the amount of damage the tanks take during this phase.

If a Mindwrack hits the tank, the other tank should taunt to keep incoming damage to a minimum.

Synaptic ShockExposed Synapse

These adds channel Probe Mind on random players, dealing a burst of shadow damage to them before attempting to spread to anyone within 5 yards.

Players should do their best to remain spread 5 yards from one another during their time in the Mind Realm as to minimise incoming raid damage.

Exposed SynapseExposed SynapseResilient Synapses

This discourages multi-dotting the adds unless it grants single target damage to the add you are currently killing.

If Psychus is within 8 yards of an Exposed Synapse when it dies, he receives a Synaptic Shock debuff which causes him to take 50% extra damage for 20 seconds. This effect stacks.

The raid should drag Psychus from synapse to synapse, killing them off as soon as possible as to give him the highest amount of Synaptic Shock stacks as possible.

DPS should be entirely focused on killing the synapse that the boss is dragged too. The boss should only be taking damage from incidental cleave and multidotters.

Upon reaching 5-6 stacks, Psychus will be taking 250-300% extra damage for 20 seconds. The raid should stop focusing on synapses and instead quickly nuke him down to end the phase.

DPS want avoid using large output cooldowns during this time, as they are best saved for when you leave the mind realm.

Position Psychus on top of the Exposed Synapse the raid is killing to give him a stack of Synaptic Shock!

Creeping AnguishPsychusCreeping Anguish

This zone is initially quite small, but it expands quickly to cover a 60 yard area.

Players stood within the zone are afflicted by Anguish, dealing ticking damage and draining 10 sanity every 2 seconds whilst reducing movement speeds by 33%.

Players must avoid standing in the Anguish zones at all times, as loosing Sanity in this way can easily cause the player to become a Servant of N'Zoth later down the line.

As the zones grow so large, it makes it difficult to backtrack towards your body at the end of the phase.

It also makes it so that you may not be able to kill every synapse in an area, as you are forced to move as the Anguish zone grows.

Anguish zones grow larger over time... don't stand in them!

Immediately drag the boss to the far wall, towards the closest Exposed Synapse.

Move the boss along the wall each time a synapse is killed. A total of 4 synapses should be killed in this way.

Once reaching the end, drag the boss towards the middle of the room, killing the one or two synapses on the way.

Finally, move back towards your bodies by moving along the small gap left near the middle of the encounter space.

This route should give the raid at least 5 stacks of Synaptic Shock, with a potential of 7-9 stacks if the synapses are killed quickly enough.

The key to this strategy is that the first two Anguish pools are placed against the edge of the encounter space, as to give you space to move back.

Do note that this path was the one we personally used during PTR testing. There are other paths and many of them may be more efficient that the path we described above. This section of the guide will be updated if better paths are discovered.

Example of route taken during the Mind Realm!

Manifest MadnessPsychusManifest Madness

This channel causes Psychus and his Anguish pools to appear in all realms.

Psychus will be dealing raid wide damage and draining 20 Sanity from all players every 2 seconds whilst also taking 99% less damage himself.

If this channel begins, it pretty much marks a wipe as you will not be able to finish him off before everybody goes insane.

This isn't really an issue during phase one, but during later Mind Realms it acts as a hard time limit that the raid must beat in order to successfully conquer the Mind Realm.

You wipe if Psychus casts Manifest Madness!

Mind's EyeMind's Eye

This is mainly present as to encourage the raid to get out of the Mind Realm as quickly as possible, just to reduce the amount of Sanity lost by the raid.

Shattered EgoPsychusShattered Ego

This allows players to interact with their bodies that are floating in the location that they first entered the realm.

Players need to leave the realm before the stun wears off, otherwise they will be instantly killed by Collapsing Mindscape.

Phase Two

Players should use this time to get as much damage onto the boss as possible by using their DPS cooldowns, as the boss is immune to damage at all other points during phase two.

Just before this stun ends, two abilities begin to appear.

Corrupted NeuronCorrupted Neuron

Each add will begin to seep out a Veil of Anguish around themselves, as well as create one around the boss and at the edge of the encounter space.

The zones around each Neuron is tied to its health. The lower its health, the smaller the zone.

As soon as the Neurons appear, the raid should clear a path between the boss and the wall that the raid can safely stand in.

Damaging the neurons reduces the size of their Veil of Anguish zones!

MindgraspMindgrasp

This will create a visual spell effect on each player which shows a shadow shooting away from them either towards or away from the boss.

After 12 seconds, the boss will then forcefully move players in that direction over 5 seconds.

The spell effect shows which way you will be dragged when Mindgrasp cast.

Anguish

This is done by standing either right next to the boss or at the very edge of the encounter space, depending on if you are pulled towards the boss or pushed away.

The path the raid takes should be free from any Veil of Anguish zones that the Corrupted Neurons generate.

The raid should create this path on the West side of the boss, because as soon as this ability ends, phase two starts proper and several tentacle adds will spawn in waves.

Make sure you are either close to the boss or far away from him when Mindgrasp is cast.

Basher Tentacle

If the Basher Tentacle isn't engaged in melee combat within a short period of time after spawning, it will cast Tumultuous Burst, dealing shadow damage to the raid every 2 seconds over 10 seconds whilst reducing their haste by 33%.

This should be avoided at all costs by having tanks run over to these tentacles as soon as they spawn.

Two Basher Tentacles can spawn at the same time whilst all players are within the normal realm. If the raid positioned on the west side of the boss after leaving phase one, the raid can easily split themselves into two groups and deal with both adds at once.

Use a defensive ability when hit by Void Lash.

Void Lash

The tank should use some form of defensive ability to lower the damage of this hit whilst healers keep them topped.

The Basher Tentacle also gains stacks of Evolving Might each time it melee hits, giving it a permanent 3% damage dealt increase.

Just make sure that Basher Tentacles are focused down as the highest DPS priority, as otherwise they might get out of control.

Corrupted MindCorrupted Mind

They simply just cast Corrupted Mind. If this cast is successful, it applies a 10 second magic debuff to a random player.

The debuff deals moderate shadow damage every 2 seconds. If the debuff expires naturally, it will drain 15 Sanity from the target.

This cast should be interrupted as much as possible. If the cast goes through, the debuff should be dispelled before it expires to prevent the player from losing any Sanity.

Interrupt the Corrupted Mind cast!

Spike TentacleSpike TentacleCorrupted Mind

These low health tentacles simply cast Pain Spike on random players, dealing moderate shadow damage.

Killing these adds should be the lowest priority of the three, and should generally be killed by players with multi-dotting and long range cleave spells.

That being said, it is advisable to remove all Spike Tentacles in an area before the next set of tentacles spawn, as they will continue dealing damage regardless of how far away from them you are.

Corrupted VisceraCorrupted Viscera

This marks several zones around the corpse of the tentacle. Moments later these zones are hit with viscera.

Players hit by the viscera take a large burst of shadow damage and have 5 Sanity drained from them.

Players simply need to dodge these zones each time a tentacle dies, especially tanks and melee as you are likely to be closer to the add.

N'Zoth Paranoia Paranoia

Every second they spend more than 5 yards away from their partner deals ever increasing ticking damage.

If a player with Paranoia stands within 5 yards of anyone aside from their partner, they lose 5 Sanity per second.

Only stand on your linked partner when afflicted with Paranoia!

Taking the ticking damage is far more forgiving than losing Sanity by running into non-partner players.

Pairs should take their time and find a safe path to their ally. Once together, they should remain with each other until the 15 second debuff times out.

It is best to spread out before this ability is cast and then stand still as much as possible, as to allow paranoid players to find one another quickly and safely.

Ranged players can be linked with Melee players. In these situations both players should aim to get to each other quickly.

Once together, they should attempt to move back towards an enemy so that the melee player can actually do something during this time.

N'Zoth's Eternal TormentEternal Torment

On a timer, this deals a moderate amount of shadow damage to all players within the normal realm every 1 second for 2 seconds.

This damage is simply present to give healers something to do. Heal it up!

MindgateMindgateMindgate

Players who stand in the Mindgate go into the Mind Realm.

The raid wants to send half of the raid into the realm. This team should have 1 tank, half the healers and half the DPS.

Players who remain in the normal realm will have half the amount of tentacle adds to deal with whilst the other half of the raid is in the Mind Realm.

Half the raid should stand in the Mindgate to enter the Mind Realm!

Mind Realm Phase Two

Mind's Eye will no longer be cast. Instead it has been replaced by different spells in each Mind Realm.

The Mind Realm will be entered twice during phase two. Each time there will be one of two different "events" taking place.

Corruption of DeathwingCataclysmic Flames

This deals a moderate amount of fire damage whilst draining 5 Sanity from all players within the Mind Realm every 3 seconds for 9 seconds.

Additionally, several Flames of Insanity zones will appear when Cataclysmic Flames triggers.

These appear as large red swirly circles. Players hit by these take a burst of fire damage and lose 20 Sanity.

This also disorients the player for 6 seconds whilst dealing ticking fire damage to them.

All players should avoid the Flames of Insanity zones. Anyone accidentally caught in one can have their disorient dispelled via a magic dispel.

Dodge the Flames of Insanity zones.

Treacherous BargainBlack Volley

This targets all players in the Mind Realm and deals moderate shadow damage and drains 5 sanity every 3 seconds over 9 seconds.

Additionally, players will occasionally be afflicted with Tread Lightly.

Whilst this debuff holds, players will take low frost damage every 2 seconds whilst moving.

During Tread Lightly, players should aim to limit their movement as much as possible, but should not completely stand still as they still need to achieve their goals within the phase.

PsychusPsychus

This is because he still has the same amount of health, but only half of the DPS are present.

This increases the chance that he will cast Manifest Madness significantly as the raid will spend far longer in the Mind Realm.

We recommend that the team still follows the same movement strategy, but instead they don't burst Psychus down until he has 6-7 stacks of Exposed Synapse.

Psychus

Both N'zoth and all of its adds will be stunned for 30 seconds due to Shattered Ego. Players should kill off any remaining tentacle adds before nuking the boss.

Phase two then resets and starts again. Players should continue to deal with tentacles until the second Mindgate appears.

At this moment, a team of players needs to enter the Mind Realm once again. On normal difficulty this can be the same set of players that entered the previous Mindgate.

After the second Mind Realm has been completed successfully in phase two, phase three will trigger.

All Mind Realm players should leave the realm and be ready to deal with the new phase three abilities.

N'Zoth Phase Three

The raid should use this opportunity to slam damage into the boss, ideally using Bloodlust, combat potions and DPS cooldowns during this time

During phase three, the raid fights N'Zoth directly. N'Zoth does not need to be tanked.

He will continue to cast Mindgrasp and has gained two new abilities.

Place all Evoke Anguish debuffs in one location!

Evoke AnguishEvoke Anguish

This 8 second debuff deals moderate shadow damage over its duration.

Upon expiration a pool of Anguish appears at the debuffed players location. This pool then grows briefly after spawning.

Every time N'zoth casts Evoke Anguish, all pools of Anguish grow in size.

Anguish

As soon as the debuff expire, all players should move out of the pools before they have a chance to deal damage to them - ideally moving in the same direction.

Each time a new set of debuffs spawn, the new Anguish pools should be placed next to the old ones.

As the Anguish pools get closer and closer, the raid will need to rotate around the boss in the direction away from the stacked pools of Anguish.

Players with high latency may wish to place their Anguish slightly behind the rest of the stacked group, as if they remain in the pools for too long they will die very quickly.

Stand in the safe space between the two Stupefying Glare eyes!

Stupefying Glare

Each add will blast out a beam, dealing high shadow damage and fearing all players caught within it for 4 seconds.

The beams will then begin to rotate around N'Zoth's body.

Players need to quickly identify where this eye is and which direction it is facing as to avoid the beam.

Players caught by the beam may end up running into pools of Anguish. A shamans Tremor Totem can be used to dispel this fear.

After moving from the Stupefying Glare, the raid should stack back up ready to deal with the next set of Evoke Anguish debuffs.

Thought Harvester

The Thought Harvester needs to be tanked and it will cast Mindwrack on the tank.

This cast cannot be interrupted, so tanks should taunt off of each other when their debuff drops.

Help soak the Harvest Thoughts if you have more than 20 sanity!

Harvest Thoughts

After a 5 second cast, all players within 15 yards of the add will take a large burst of shadow damage.

The add will also drain 200 sanity divided evenly among all players hit by the ability.

If fewer than 3 players are hit by Harvest Thoughts, all players lose 50 Sanity.

The raid needs to send in several high Sanity players to soak this mechanic.

There is no set limit to how many players should soak this hit, so the more high-sanity players that soak - the better.

We recommend that at least 5 players are present for each Harvest Thought cast.

As this add spawns throughout the phase, all DPS should aim to kill the add as soon as possible as to ensure that no more than one is active at any given time.

The raid may want to make a call to nuke the boss and ignore the Thought Harvester adds when the boss is at low health, as to try and kill him before the next set of adds spawn.

If this last phase goes on for too long, two Thought Harvester adds will spawn each time, rather than one.

It is at this point that the raid should really be looking to kill the boss, as having to deal with several adds can strain the healers and the raids sanity

Heroic DifficultyFettered MindFettered Mind

This prevents those players from entering the Mind Realm via a Mindgate for the rest of the attempt.

This forces the raid to use two teams made up of unique players for each of the two Mind Realms.

The raid leader should assign these groups before the fight, and should attempt to make them as even as possible in terms of player output.

Stupefying Glare

This makes dodging the beams more challenging, as there is less safe spaces to stand in.

Players just need to quickly identify where the nearest safe spot to stand in is and run to it. It is okay if you end up split up from the raid, just make sure you return to them after the beams have despawned.

Mythic DifficultyMythic N'Zoth Strategy Guide

Besides the addition of the Mythic phase, this encounter has a few changes in each phase which significantly change the strategy requirements from Heroic. The first phase of Heroic, where the entire raid fights Psychus, is completely skipped on Mythic difficulty. Instead, the raid will have to deal with two waves of adds before going into the first Psychus phase.

Across all phases Paranoia will affect every player in the raid, with the exception of tanks. Certain Paranoia timings are also synced with Mindgrasp, introducing another element of difficulty.

During the first phase, any Corruptor Tentacles that are killed will spawn Psychophages which will cast Devour Thoughts when reaching a player, and cast Psychic Burst when they die. These adds pose a big issue in phase 1, because they largely limit space.

In the second phase, there are two important changes. Firstly, Evoke Anguish will explode and cleave players within 4 yards when the debuff expires. This change will severely restrict the amount of space in the encounter area by forcing the raid to spread out each time this ability is cast. The second change is that each wave of Thought Harvesters will contain two adds, making it important to have at least 8 - 10 immunity classes in the raid.

Mythic N'zoth Guide

N'zoth the Corruptor Advice for All Classes

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Comments

Comment by Glazdjo

Thank you for the hard work and amazing guide!
'If fewer than 3 players are hit by Harvest Thoughts, all players lose 50 Sanity.' In the tooltip on ptr it is said 'fewer than 5 players' at the moment.

Comment by Zennen313

Would like to see an update on this page as it's been live for a while now =) Good work!

Comment by CriTicalCash

Yo can someone carry me through the damn raid i just want the uncorupted voidwing

Comment by Pisky

Is the cloak still required for the last two bosses of Ny'alotha in 9.0.1 Shadowlands pre-patch? I mean, it still should be because of the boss abilities, but the tooltip now lacks any corruption or sanity drain resistances.

Also, is the raid overall easier or harder in the pre-patch?

Comment by CarrionCarcass

The cloak and how is still required for the fight even, the cloak no longer has the restore sanity but it's still needed as it will remove corruption. BfA was last expac so I don't expect this fight to be easy anytime soon but even then, the sanity requirements and need to take down multiple mobs would still make it difficult for probably the next few expacs.

Comment by bugzy2341

I just beat him for the first time last night in a Pug. And I am just posting things here that I remember so I do not forget, and it can probably help others to try to beat him.

These are just mechanics I know that I was following that others were stating in the group that was in that I am putting into my own words.

I am assuming that everyone has their cloaks in the group. You need that cloak. My Cloak was a rank 6 one and I was fine.

1. If someone has a yellow ring around them, stand in it so it helps your sanity. It means that someone hit their necklace. It will help you. If you hit yours, don't move until the ring disappears, if you do move your ring will disappear. Don't worry if others stand in your ring, it helps them too.
2. If you know you are going to go insane and you already used your necklace, just jump off the side and die so others can continue the fight without having you attacking them.
3. If you are Tethered to another player, get close to each other (stand on each other) so you won't go insane. By Tethered to someone I mean being Linked to another player by a beam.
4. To go down in phase 2 you will see a DARK BLUE Puddle that forms somewhere and depending on the group going down, go in.
5. When you go down, Kill the Big Guy that is running around.
6. To get back up after killing the Big Guy go and click on your spirit that is exactly where you went down to begin with. It's like a yellow orange color.

Aside from that, just kill.

I have never gotten him down before and for a very long time have tried to kill him with other PUG's. This time I got it down. I was on my Warlock on Mythic.

People just don't know what they are doing for mechanics. I hope this all helps.
Anyone wanting to add anything else please do.

Comment by Paperclips

It's possible to solo this. I play Shadow Priest, level 70, tried this on Normal.
Have Ashjra'kamas, Shroud of Resolve equipped. I had Heart of Azeroth in my bags, but not equipped (doubt that carrying the necklace makes any difference).
The fight is primarily about not running out of sanity (the bar that you get during the encounter - gold=good, purple=bad)
Can't do anything useful to N'Zoth at start or any time he's shielded.
When you go into the other realm, your 'body' stays where you entered the realm. Try to kill Psychus quick and away from your 'body' so that it's not laying in the pool Psychus pees out.
Once Psychus is dead, touch your 'body' and quickly get some damage on N'Zoth before his shield comes back.
Kill tentacles, don't stand in anything.
I didn't get any visual indicating the direction of Mindgrasp for some reason, so I just cleared a path and hoped I stood in a good place.
Everything that touches you drains your sanity and you can only use the Azeroth's Radiance Extra Action Button cleanse once every three minutes.
DO NOT MOVE when you press Azeroth's Radiance - it's a four second channel.
The next two 'other realm' phases are through portals that open into the room. Click the portal, kill Psychus, touch yourself, dps N'Zoth, don't get hit by anything.
Last phase was hectic, but N'Zoth loses his shield and at max level you should be able to just focus on him and finish the encounter.
(If you're on Mythic, click the doorway that spawns, kill the add, then click the doorway to go back.)
I only had to use Azeroth's Radiance Extra Action Button one time.

Edit: July 19, 2025
At max level, now, you should be able to just send it. When the sanity runs out (at every difficulty, including Mythic) the encounter just continues and nothing happens to you. I just follow the usual steps and ignore the sanity bar entirely.

Edit: April 16, 2026
If you're finding yourself insta-dying after a portal phase, you're probably damaging N'Zoth too quickly. You seem to need to do both Psychus realm phases before killing him without bugging anything out. You also don't need either the cloak or necklace with you at all.

Comment by Hexatomon

Seems to be no point whatsoever to equip either the amulet or the cloak anymore - the action button regens ZERO sanity at level 80 in TWW, it's just a waste of time to click it and also you suffering reduced killing power equipping the items. You will go insane, and then nothing happens. You can continue fighting as normal. Just don't miss the Psychus portal spawning amidst all the tentacles and get oneshot repeatedly like I did, until I figured out what was going on... :D

Comment by Nattskift

As of 11.0.5, he is bugged.

Psychus fails to spawn and you will just be killed. Tried today on Mythic multiple times, but just got insta-killed when N'zoth reached full energy.

Comment by unclevinny

On LFR today, I'm skipping the cloak and neck.

Psychus spawns immediately behind you as the fight starts. I pull him onto a tentacle if possible, kill him. Click your orange body to return; it will be very close to you. Then I get the window to DPS Nzoth. After he’s invulnerable, kill tentacles while waiting for Basher (or crusher?) tentacles to spawn. Kill them asap. Between where they were, a mind gate will appear on the floor. Enter it, kill Psychus ASAP. Right behind you, your orange body will be on the floor; click it. Now you repeat this cycle:

DPS Nzoth
Kill Basher/Crusher tentacles
Enter Mind Gate
Kill Psychus, click your body
DPS Nzoth

N'zoth the Corruptor - Ny'alotha Raid Strategy Guide

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