Raid boss guidesThe Venomous Abyss
Midnight Season 2 encounter guide

Ula'tek

Ula'tek, the imprisoned snake goddess, is a three-phase fight with an intermission before the final phase, and the whole encounter revolves around her eggs: break them on your terms for weakened adds, or let venom touch them and fight empowered adds instead. The raid loops between dodging Caustic Waves, group-soaking Spectral Coils to smash carried eggs, and bursting the Venomous Heart for double damage during Rage of the Shackled. Groups wipe when eggs hatch in venom, when Serpent's Bite circles go unsoaked in Phase 3, and when players are slow to evacuate the platform for Circling Prey.

Before the pull

Set the encounter assignments before pull

  • Split the raid into two even groups before the pull, with one tank leading each group, because Phase 2 sends half the raid to each side of the room to fight a Doomscale Warden.
  • Assign every player an egg pickup responsibility on the pull and after each Call of the Serpent; an egg that touches venom or finishes its cast hatches into an empowered add that sprays Putrid Membrane over the whole raid.
  • Assign one carrier per side for the Phase 2 Doomscale Egg: the raid has 90 seconds to pick it up, and the carrier then has 20 seconds to walk it into the Doomscale Cauldron.
  • Set an interrupt rotation for Malice on the Doomscale Wardens and Anguished Cry on the Weakened Doomscales; both are raid-killers if they finish casting.
  • Plan Bloodlust and Heroism for Phase 3, and hold major DPS cooldowns for the two Rage of the Shackled burns, where the Venomous Heart takes double damage.
  • Plan healing cooldowns for Rage of the Shackled, Spectral Coils soaks, and the Phase 3 Serpent's Bite plus Volatile Purge sequence, and remind the raid that Putrid Membrane rot stacks for the rest of the fight.
Fight flow

Resolve the encounter in this order

  1. 01

    Pull, split tanks, and grab the first eggs

    Open with one tank on Ula'tek and one tank on the Gore Rattle tail, which spawns on the left or right side and shares health with the boss. Everyone else walks over the eggs near the center to pick one up, then avoids all venom while carrying it.

  2. 02

    Dodge Caustic Waves and swap tanks

    When Ula'tek reaches back with one wing, waves come from that side first and the other side follows, then the tail sends its own sets of waves. Dodge to the safe side, keep carried eggs out of every wave, and have the tanks swap boss and tail during this cast.

  3. 03

    Soak Spectral Coils to break your eggs

    When the tail casts Spectral Coils, every player except the active boss tank stands in the group soaks on both sides of the tail. The impact splits its damage among soakers and smashes every carried egg, spawning weakened adds that you group and AoE down.

  4. 04

    Burn the Venomous Heart

    At the end of Phase 1, Rage of the Shackled deals rolling raid damage, drops Falling Debris circles to dodge, and exposes the Venomous Heart. The Heart shares health with Ula'tek and takes double damage for 20 seconds, so pot, burst the Heart, and cleave the boss.

  5. 05

    Phase 2: sides, Wardens, and the Cauldron

    Split to your assigned sides and kill the Doomscale Warden while interrupting Malice, breaking Grasping Fangs tethers by running away, and killing any Blightscale Clutch it gestates. Once the Warden dies, your side picks up every small egg, the assigned carrier grabs the Doomscale Egg last, and everyone dunks eggs into the Doomscale Cauldron. Interrupt the Weakened Doomscale's Anguished Cry, drag all adds to the center platform for cleave, and burn the second Venomous Heart, which is exposed at 4:45 on the clock.

  6. 06

    Intermission: catch eggs and rotate soaks

    Eggs rain from the ceiling, so pick them all up immediately. Spectral Coils soaks then appear around the platform; move the group from soak to soak to split the damage, break the carried eggs, and AoE the weakened adds as they spawn.

  7. 07

    Phase 3: soak, spread, and jump platforms

    Ula'tek splits the room into quadrants and repeats a fixed cycle on each platform: kill the egg that lands on your platform, group-soak the Serpent's Bite circles until the debuff fades, stand in the gaps between the orbs that telegraph Caustic Waves, spread away from everyone when Volatile Purge erupts, and evacuate the platform the moment she casts Circling Prey. Cross to her new platform and repeat the cycle until she dies; eggs on destroyed platforms land in venom and hatch empowered adds that need a poison dispel.

Measured timeline

What the clock actually does

Fixed timer - same clock for every raidTop-50 Heroic kills run 7:22 to 8:01, median 7:44.

The most reliable clock in the raid, and the one place these times can be read straight off a stopwatch. Four of the five sampled kills hit 2:44, 5:09 and 6:03 exactly, and so did a much slower pull that wiped with 10.8 percent left, 40 seconds longer than the slowest kill. Only the fastest kill in the sample (7:22) outran it, reaching the intermission and Stage Three about 12 seconds early, so a raid pushing top-50 speed is the one case where these drift.

  1. 0:20

    First Spectral Coils

    And again at 1:55, 95 seconds later.

  2. 0:42

    First Caustic Waves

    And again at 1:34. Any wave that touches a carried egg hatches it, so carriers plan around these two.

  3. 2:09

    Rage of the Shackled

    The rage begins about six seconds before the Heart is exposed, which is the cue to line up cooldowns rather than react to the Heart itself.

  4. 2:15

    First Venomous Heart

    2:15 or 2:16 in every kill measured, and 2:15 in the slower wipe.

  5. 2:44

    Stage Two: Children of the Doomscale

    2:43 to 2:44 in all five kills, and 2:44 in the slower wipe.

  6. 4:45

    Second Venomous Heart

    149 seconds after the first, to the second, in every sample.

  7. 5:09

    Intermission: The Shattering

    5:09 in four of five kills and in the slower wipe; the 7:22 kill reached it at 4:57.

  8. 6:03

    Stage Three: Ula'tek's Ascension

    6:02 to 6:03 in four of five kills and in the slower wipe; the 7:22 kill reached it at 5:51.

  9. 6:27

    First Serpent's Bite

    Then 7:38, 71 seconds later. Soakers stand on the mark before the cast rather than after it.

  10. 7:02

    First Circling Prey

    Then 7:53, 51 seconds later. She destroys the platform she is on, so the evacuation call goes out on the clock.

Five top-50 Heroic kills of Warcraft Logs encounter 3492, sampled across the ranking spread, cross-checked against an 8:41 Heroic wipe at 10.8 percent (report Rq36AyX9wmcz1vLB, pull 13). Measured 2026-09-16.

Mechanics

What each mechanic asks of you

Eggs (Blightscale Spawn)

Everyone

Pick up eggs by walking over them and break them deliberately, either by standing in a Spectral Coils soak or by damaging the egg to zero health, so a weakened add spawns. Never let a carried egg touch venom, waves, or finish its cast. On Mythic, eggs are Hardened and apply Noxious Shell, so carriers must stay 3 yards from each other.

Failure: A hatched egg spawns an empowered Blightscale Viper that sprays Putrid Membrane on the whole raid, a stacking Nature DoT that lasts the rest of the fight.

Caustic Waves

Everyone

Watch which wing Ula'tek raises; that side sends waves first and the far side follows, and in Phase 1 the tail adds its own waves. In Phase 3 the waves are telegraphed by orbs in front of her, so stand where there are no orbs.

Failure: Each wave hits hard on impact and leaves a stacking DoT, and any wave that touches an egg instantly hatches it into an empowered add.

Raid Finder
167548 on impact, then 16146 a second for 10 seconds.
Normal
329839 on impact, then 123053 a second for 10 seconds.
Heroic
556472 on impact, then 116285 a second for 10 seconds.
Mythic
917189 on impact, then 540199 a second for 10 seconds.

Spectral Coils

Everyone except the active boss tank

Stack in the soak circles on both sides of the tail; the hit is split by the number of players within 10 yards of the impact and smashes every carried egg. On Heroic and Mythic, soakers gain Soul Constrictor and must sit out the next set, so run two alternating soak teams.

Failure: An unsoaked coil hits the entire raid for the full amount, and every egg that was not broken lives on to hatch later.

Raid Finder
368087 Nature, split by the soakers within 10 yards.
Normal
482743 Nature, split by the soakers within 10 yards.
Heroic
679733 Nature, split by the soakers within 10 yards.
Mythic
916747 Nature, split by the soakers within 10 yards.

Gore Rattle tank duty

Tanks

Keep one tank on Ula'tek and one tank on the Gore Rattle tail at all times, and swap targets during each Caustic Waves cast. Stay in melee range of your target, and keep a body inside the Mother's Wrath zone when your tank is marked.

Failure: An untanked tail casts Rattler Slam on the whole raid, an unmeleed boss casts Unchecked Rage on the raid, and an empty Mother's Wrath zone spreads its bites to every player.

Doomscale Egg and Cauldron

Assigned carriers per side

In Phase 2, after the Warden dies, each side picks up all small eggs first, then the assigned player grabs the Doomscale Egg. Walk next to the Doomscale Cauldron to throw each egg in; the raid has 90 seconds to pick the big egg up and the carrier has 20 seconds to dunk it. On Heroic and Mythic, disturbing a Doomscale Egg triggers Mass Gestation on all remaining Blightscale Spawn on that side, so clear the small eggs first.

Failure: A Doomscale Egg that hatches releases a Ravenous Doomscale whose 20-second Dread Roar stuns the raid and wipes it.

Serpent's Bite

Marked players plus assigned soakers

Three players get a 15-second venom debuff in Phase 3. Helpers stand inside a marked player's circle to leech ticks until the debuff fades harmlessly; marked players can spread for dedicated soakers, or overlap circles so one group soaks several at once. Every leecher gains Volatile Purge and must spread away from other players before it erupts 5 seconds later.

Failure: An unsoaked debuff expires and turns the player into a Calcified Corpse, a stun plus roughly 1M Nature damage per second that pierces immunities, and on Mythic the purge also fires Caustic Waves from the player.

Circling Prey

Everyone

When Ula'tek casts Circling Prey she destroys the platform she occupies, so evacuate immediately and jump to a surviving platform, then regroup on the platform where she re-emerges.

Failure: Players caught within 13 yards take a huge hit and a knockback, which usually means falling to their death, and stragglers outside still take a quarter of it.

Raid Finder
1004774 inside 13 yards, 251322 outside.
Normal
1317752 inside 13 yards, 329607 outside.
Heroic
1852867 inside 13 yards, 463455 outside.
Mythic
2500220 inside 13 yards, 625055 outside.
Encounter Journal

Ula'tek's actual abilities

The named boss spells, their individual sub-abilities, and the response for each. Ability names with known spell IDs open their own WoW-God spell pages.

Caustic WavesStage One and Stage Three

Ula'tek sends waves of venom across the platform that hit on impact and leave a stacking 10 second DoT, and any wave that connects with an egg instantly hatches it.

Raid Finder
167548 on impact, then 16146 a second for 10 seconds.
Normal
329839 on impact, then 123053 a second for 10 seconds.
Heroic
556472 on impact, then 116285 a second for 10 seconds.
Mythic
917189 on impact, then 540199 a second for 10 seconds.

Raid response: Watch the raised wing in Phase 1 and dodge to the far side first, then dodge the tail's waves. In Phase 3, stand in the gaps where no telegraph orbs sit in front of her. Tanks swap boss and tail during this cast.

Spectral CoilsStage One and Intermission

Spectral coils crush the platform and hit all players, reduced by the number of players within 10 yards of each impact, and the impact breaks every carried egg into a weakened add. On Heroic and Mythic, soakers gain Soul Constrictor and cannot mitigate the next set.

Raid Finder
368087 Nature before the split.
Normal
482743 Nature before the split.
Heroic
679733 Nature before the split.
Mythic
916747 Nature before the split.

Raid response: Everyone except the active boss tank stacks in the soak circles on both sides of the tail, breaks their eggs, then groups the weakened adds for AoE. On Heroic, alternate two soak teams because of Soul Constrictor.

Rattler SlamStage One

While the Gore Rattle tail is not engaged in melee combat, it slams the platform, hitting every player.

Raid Finder
100674 Nature to the whole raid.
Normal
483613 Nature to the whole raid.
Heroic
679999 Nature to the whole raid.
Mythic
916747 Nature to the whole raid.

Raid response: The second tank stays glued to the tail for the entire phase; the tail and boss share health, so DPS can cleave it freely.

Rage of the ShackledStage One and Stage Two

Ula'tek rages for 20 seconds, hitting the raid every 4 seconds, dropping Falling Debris circles within 7 yards, and exposing the Venomous Heart, which shares her health and takes double damage.

Raid Finder
167548 every 4 seconds. Falling Debris hits for 252022.
Normal
219738 every 4 seconds. Falling Debris hits for 396447.
Heroic
308970 every 4 seconds. Falling Debris hits for 557436.
Mythic
500044 every 4 seconds. Falling Debris hits for 2500220.

Raid response: Dodge the debris circles, use a healing cooldown for the rot, and pour every DPS cooldown into the Venomous Heart while cleaving the boss. Both windows are on a fixed clock: the Heart is exposed at 2:15 near the end of Phase 1 and again at 4:45 in Phase 2, 149 seconds apart, in every kill measured. The rage itself starts about six seconds earlier, at 2:09, so cooldowns go out on the rage rather than on the Heart appearing.

Call of the SerpentStage One and Stage Three

Ula'tek roars and shakes her spawn from the ceiling. The eggs land and sit there waiting to hatch.

Raid response: Assigned players walk over the new eggs immediately and hold them away from venom until the next Spectral Coils soak or DPS window breaks them safely.

MaliceStage Two

The Doomscale Warden unleashes malice that hits all players every second for 6 seconds if it completes.

Raid Finder
50264 Nature a second for 6 seconds.
Normal
417642 Nature a second for 6 seconds.
Heroic
587239 Nature a second for 6 seconds.
Mythic
791736 Nature a second for 6 seconds.

Raid response: Follow the interrupt rotation on each side and never let Malice finish; the Warden also uses Shadow Molt to reposition, so interrupters must stay on it.

Anguished CryStage Two

The Weakened Doomscale screams, hitting every player within 60 yards and stunning them for 6 seconds.

Raid Finder
217813 Nature and a 6 second stun.
Normal
285660 Nature and a 6 second stun.
Heroic
401661 Nature and a 6 second stun.
Mythic
541714 Nature and a 6 second stun.

Raid response: Assign a dedicated interrupter to the Weakened Doomscale the moment it leaves the Cauldron, then drag it and the other adds to the center platform for cleave.

Serpent's BiteStage Three

Ula'tek shoots fangs into several players, applying a 15-second venom that turns the victim into a Calcified Corpse on expiration, a stun plus damage that pierces immunities. Players within 7 yards can leech the venom away but gain Volatile Purge.

Raid Finder
167548 on impact, then 40212 a second for 15 seconds.
Normal
224116 on impact, then 52737 a second for 15 seconds.
Heroic
315125 on impact, then 74153 a second for 15 seconds.
Mythic
416703 on impact, then 100009 a second for 15 seconds.

Raid response: Marked players spread to their assigned spots, and everyone else stands inside a circle to soak ticks until the debuff fades. Overlapping circles lets soakers clear several marks at once, but simple one-circle soaking is enough.

Volatile PurgeStage Three

Players who leech Serpent's Bite purge the venom after 5 seconds, and the eruption hits players near them plus a stacking DoT. On Mythic, Caustic Waves also erupt from the player when the aura expires.

Raid response: As soon as the soak completes, everyone spreads apart and stays spread until every purge has erupted, then regroups for the platform jump.

Circling PreyStage Three

Ula'tek destroys the platform she occupies, dealing heavy damage and a knockback within 13 yards and a smaller hit to players farther away.

Raid Finder
1004774 inside 13 yards, 251322 outside.
Normal
1317752 inside 13 yards, 329607 outside.
Heroic
1852867 inside 13 yards, 463455 outside.
Mythic
2500220 inside 13 yards, 625055 outside.

Raid response: Evacuate the platform the moment the cast starts and cross to a surviving quadrant, then move to the platform where she re-emerges. Expect the eggs on the destroyed platform to hatch empowered adds that need a poison dispel.

Ula'tek knocks her current target back and marks them, biting every 5.2 seconds while anyone stays within reach.

Raid Finder
83777 Nature a bite.
Normal
197768 Nature a bite.
Heroic
587047 Nature a bite.
Mythic
375033 Nature a bite.

Raid response: Keep a body inside the marked zone so the bites have a target. An empty zone spreads them to the whole raid.

Unchecked RageAll stages

If Ula'tek cannot melee anyone while she is not casting, she inflicts Physical damage on every player.

Raid response: A tank stays in melee range at all times. This only ever fires when she has been left alone.

Falling DebrisRage of the Shackled

Debris drops on several random spots and hits everyone within 7 yards of each impact.

Raid Finder
252022 Nature an impact.
Normal
396447 Nature an impact.
Heroic
557436 Nature an impact.
Mythic
2500220 Nature an impact. Over four times the Heroic hit.

Raid response: Watch the floor during the Heart burn and step out of the circles. It is the one thing that kills people inside a damage window.

A hatched Blightscale Viper sprays the whole raid with a Nature DoT. On Mythic it runs an hour, so it never falls off.

Raid Finder
13404 Nature a second.
Normal
17579 Nature a second for 10 seconds.
Heroic
24718 Nature a second for 20 seconds.
Mythic
33336 Nature a second for an hour.

Raid response: This is the cost of every egg that hatches wrong. On Mythic the egg plan is really a healing plan.

Soul ConstrictorHeroic and Mythic

Soaking Spectral Coils prevents you mitigating the next set for a few seconds.

Normal
6 seconds without mitigation.
Heroic
6 seconds without mitigation.
Mythic
5 seconds without mitigation.

Raid response: Run two soak teams and alternate. Whoever soaked last time sits the next one out.

Carried eggs inflict 133345 Nature damage a second, and two carriers within 3 yards of each other cause a Noxious Splash.

Raid response: On Mythic, egg carriers spread out. Three yards apart is the whole rule.

The Doomscale Warden sinks fangs into random players, ticking every 2 seconds with a 45 percent slow until the tether breaks.

Raid Finder
67019 Nature a tick.
Normal
87895 Nature a tick.
Heroic
216279 Nature a tick.
Mythic
166681 Nature a tick.

Raid response: Run away from the Warden to snap the tether. Standing still leaves you slowed and bleeding.

The Warden turns nearby Blightscale Spawn into a Blightscale Clutch that hatches after 20 seconds.

Raid response: Break the clutch inside those 20 seconds. Your side has one job while it is up.

The spawn inside the clutch grow stronger the longer it is left unbroken.

Raid response: Kill it early. Every second it lives makes what comes out of it worse.

Venomous HeartRage of the Shackled

The beating core of Ula'tek. It shares her health and takes double damage for 20 seconds.

Raid response: Pot and send every cooldown into the Heart while cleaving the boss.

The Doomscale Egg sticks to whoever touches it, ticking every 2 seconds, and hatches 20 seconds after pickup.

Raid Finder
13397 Nature a tick.
Normal
30763 Nature a tick.
Heroic
61794 Nature a tick.
Mythic
100009 Nature a tick.

Raid response: Clear the small eggs first, then dunk the big one inside 20 seconds.

Shadow MoltStage Two

The Doomscale Warden sheds its shadow skin and slithers to a new spot.

Raid response: Interrupters move with it. Malice still has to be kicked after.

Role plan

Your job in the pull

Tanks

Run a two-target duet all fight: one tank on Ula'tek and one on the Gore Rattle tail, swapping during every Caustic Waves cast. Stay in melee range so Unchecked Rage and Rattler Slam never fire, stand in the Mother's Wrath zone when marked, and in Phase 2 each tank leads one side and picks up the Doomscale adds.

Healers

Assign raid cooldowns to the two Rage of the Shackled burns, the Spectral Coils soaks, and the Phase 3 Serpent's Bite windows. Expect permanent stacking rot from Putrid Membrane whenever an egg hatches wrong, dispel poison off players hit by empowered adds in Phase 3, and top soakers before each Volatile Purge spread.

Melee DPS

Cleave the tail and boss in Phase 1 since they share health, carry eggs between mechanics, and hold burst for the Venomous Heart, which takes double damage while sharing the boss's health pool. In Phase 2, cover the interrupt rotation on your side's Doomscale Warden.

Ranged DPS

Break Blightscale Clutches before Writhing Gestation completes, DPS eggs to zero from range when a soak is not available, and snipe the Phase 3 platform egg quickly so the add pack can be grouped and killed before Serpent's Bite goes out.

Everyone

Pick up your assigned egg, keep it out of every wave and puddle, soak Spectral Coils unless you are the active boss tank, and treat platform evacuation on Circling Prey as the highest priority in Phase 3.

Sources

Where this guide comes from

Video guide

Watch Ula'tek guides

Review available video breakdowns alongside the written assignments.

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