Overview
Split into two equal groups before the pull. They soak Spectral Coils and take opposite Phase 2 sides. Assign rotating egg carriers and four Toxic Incubation interceptors. Break Hardened absorbs before anyone tries to move an egg.
Phase 1 is two egg-and-wave cycles into a Venomous Heart burn. Phase 2 is a split Warden and cauldron delivery, with synchronized Weakened Doomscale kills. The intermission is Coil soaks on a rotating tail. Phase 3 shrinks the floor with Circling Prey while three Serpent's Bite groups soak, then spread so Volatile Purge waves miss the raid.
Phase 1
Three eggs sit mid. Touching them pulls, but Hardened eggs cannot move until the absorb dies. Assign three carriers and keep them 3 yards apart so Noxious Shell does not splash. One tank holds Ula'tek, one holds the tail. Empty melee is raid Mother's Wrath. Empty tail is a Rattler Slam. Swap during Caustic Waves.
Spectral Coils slams both sides of the tail. Split the two groups, one soak each. Soul Constrictor blocks the next soak, so do not stack both groups on one slam. The soak breaks carried eggs into Rawlings. Kill Rawlings before Boiling Venom at 25 seconds.
A spectral Ula'tek beams Toxic Incubation at the Wretch from Toxic Womb. Intercept the beam or the add stacks Mother's Boon. Each intercept also erupts Caustic Waves from that player, so aim it into empty space.
She pulls one wing back, then that side's Caustic Waves fire first. Run opposite the pulled wing. A wave that hits a carrier hatches a Viper. After two egg-and-wave cycles she casts Rage of the Shackled. The Venomous Heart takes double damage for 20 seconds. Bloodlust about five seconds early, dodge Falling Debris, and burn.
Phase 2
The two groups cross to opposite corridors. Grip and rescue out, save a Warlock gate for the return. Kill the Doomscale Warden first. Grasping Fangs tethers three players per side. Breaking a tether applies stacking Blight Vein to the whole raid for six seconds. Snap two at a time, wait for the DoT to drop, then snap the next pair.
After the Warden dies, pick up leftover eggs, then the big Doomscale Egg last. Walk them into the Doomscale Cauldron, small first. Interrupt the Weakened Doomscale's Anguished Cry. Both sides must kill their Weakened Doomscale together or the survivor casts Revenge. Then gate back and stack for the second Rage of the Shackled.
Intermission
Eggs fall mid. Break Hardened, then pick them up with rotated carriers. Tails rise around the room. Group 1 soaks casts 1, 3, and 5. Group 2 soaks 2, 4, and 6. Soul Constrictor is why you alternate. When the floor glows, stand at the edge. The middle shatters into four platforms.
Phase 3
She surfaces at the bubbles. Tanks and melee play on her platform. Ranged and healers start one platform counter-clockwise. Call of the Serpent drops a clutch on each platform. Stay out of the spawn circles, then kill the eggs before they hit venom. Intercept any Toxic Incubation that targets a Wretch.
Serpent's Bite marks one melee, one healer, and one ranged. Assign three soak groups. Stay in the circle until the debuff clears, then spread so expired Volatile Purge does not fire Caustic Waves through the raid. A missed soak becomes a Calcified Corpse. Weave leftover waves through the gaps. Leave the melee platform before Circling Prey breaks it.
Broken platforms hatch Shriekers. Taunt them to the boss, interrupt Vicious Echoes, and kill them before Boiling Venom. The second platform break is the hardest overlap. On the last floor, soak one more Bite, dodge the wave, then burn the last Venomous Heart. If she is at 1 or 2 percent when the floor goes, jump off behind her and finish.
By role
Tanks
Hold Ula'tek and the tail. Swap during Caustic Waves. Stay in melee for Mother's Wrath and run back into the red pool. In Phase 2, stack the Warden on glowing eggs and call the paired Weakened Doomscale kill. In Phase 3, taunt Shriekers onto the boss.
Healers
Putrid Membrane is the tax for every Viper. Ramp Spectral Coils and the Venomous Heart windows. Cover stacked Blight Vein when tethers snap. Assign extra soakers to the healer Serpent's Bite, then spread so Volatile Purge waves miss the group.
DPS
Break Hardened, rotate carriers, and keep 3 yards between Noxious Shells. Intercept Toxic Incubation. Soak your Spectral Coils. Interrupt Malice and Anguished Cry. Snap Grasping Fangs in pairs. Kill clutch eggs and Shriekers before they boil. Lust the first Rage of the Shackled.
Why pulls die
Vipers from Caustic Waves on carriers stack Putrid Membrane until healers cannot cover it. Two Noxious Shell carriers that touch hatch instantly. An unsoaked Toxic Incubation Wretch Fester Bursts. Simultaneous Grasping Fangs breaks stack Blight Vein on both sides. A missed Serpent's Bite is a Calcified Corpse, and a clumped Volatile Purge launches more waves. Late Circling Prey leaves people on a dying platform.
Questions
What hatches a Viper instead of a Rawling?
An egg or carrier that touches Caustic Waves or the venom around the platform. Two Noxious Shell carriers inside 3 yards hatch instantly. A Spectral Coils soak hatches a Rawling instead. Every Viper sprays Putrid Membrane.
Where do you Bloodlust?
The first Rage of the Shackled in Phase 1. The Venomous Heart takes double damage for 20 seconds.
How do you handle Hardened eggs?
Break the absorb first. Then one player picks it up. Keep carriers 3 yards apart. After the drop, Rancid Yolk increases the next Noxious Shell, so rotate carriers.
How do you handle Toxic Incubation?
Assign interceptors. Eat the beam before it hits the Wretch. Each intercept erupts Caustic Waves from that player, so aim it into empty space. A Wretch that soaks the beam gains Mother's Boon and later Fester Burst.
How do you handle Serpent's Bite?
Three groups stay in the circle until it clears, then spread for Volatile Purge. The expire also fires Caustic Waves, so helpers aim outgoing waves into empty space. A missed soak becomes a Calcified Corpse.