The raid splits in half, each side fighting one Guard - Acid or Blood - with its own mechanics, then swaps sides at every intermission to drop the stacking Mark. Boss health must stay even, because Vitriolic Stasis heals the lower Guard up to match the higher one.
Each half of the raid takes its Guard, tanks hold them 40-plus yards apart, and both sides keep damage even so neither Guard runs ahead on health.
Group-soak each red Unstable Miasma circle, accept the Blood Venom stacks, and when they expire drop the void zone on the edge next to existing puddles. Healers dispel Blighted Blood near those same puddles.
Dodge the green Living Venom lines aiming at the boss, step on Toxic Droplets before they explode, and hard-swap to the Venom Coagulation add to stop its pulsing damage.
Empowering Slam and Bloodvenom Injection are the big tank moments - use cooldowns, and remember the Guard keeps hitting harder until the tank targets swap.
At 100 energy the Guards clash in the middle and the lower one heals up to match the higher. During the channel, pair up so your Helical Toxin numbers total exactly 4 - 1 finds 3, 2 finds 2 - to clear the toxin.
After every intermission the halves trade Guards so the stacking Mark of Acid or Blood falls off. Re-establish the 40 yard separation immediately and repeat until both die together.
Every clash landed on the same second across kills from 3:36 to 4:47, a spread of 71 seconds. If the clash were gated on boss health the second one would have slid to about 2:60 in a 4:47 kill; it landed at 2:27 to 2:31, within 3 seconds of where the fast kills put it. These are wall clocks you can write on the assignment sheet.
Then every 52 seconds: 1:16, 2:08, 2:57, 3:49.
0:46 in all five kills. This is the first side swap and the first Helical Toxins pairing.
103 seconds after the first, again in all five kills.
Measured, not projected: three separate 4:47 kills reached it at 4:08, 4:08 and 4:15. Any pull that runs past four minutes gets a third side swap.
Projected from the measured 103 second cadence, not observed: the slowest kill measured here ended at 4:47. A raid that meets it is simply slower than the ranking field, and the swap still happens on the same clock.
Five top-50 Heroic kills of Warcraft Logs encounter 3445, sampled across the ranking spread, cross-checked against three 4:47 kills from deeper in the rankings. Measured 2026-09-16, cross-check 2026-09-20.
Keep the Guards more than 40 yards apart at all times - inside the Dominance range they take 99 percent reduced damage.
Failure: Bosses drifting together turns the raid's damage off and wastes the timer.
Fighting within 40 yards of a Guard stacks a damage-over-time Mark that only falls when you swap to the other Guard - which is why sides trade at each intermission.
Failure: Staying on one side all fight ramps the Mark until healers cannot keep up.
During the clash channel, collide with another player so your combined toxin applications equal exactly 4.
Failure: Wrong totals or unpartnered players deal raid-wide damage on top of the intermission.
Group-soak the marked red circle, then walk the expiring Blood Venom stacks to the edge - the void zone size scales with stacks.
Failure: A solo soak or a center drop floods the arena with avoidable void zones.
Dodge the slime lines being sucked back to the boss, step on droplets to pre-empt their explosion, and nuke the Coagulation add on sight.
Failure: Ignored droplets and a live Coagulation add turn the acid side into constant unplanned raid damage.
Dispel the ticking Shadow debuff with the player positioned near existing puddles, since the dispel drops one.
Failure: Dispelling in the open scatters puddles through the play space.
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.
The Guards take 99 percent reduced damage while they stand near each other.
Raid response: Tanks own the geometry; everyone else respects the two-camp split.
Players near a Guard take stacking damage over time until they swap Guards.
Raid response: Swap sides at each intermission to reset the stack.
The Guards clash in the middle and the lowest-health Guard heals up to match the highest.
Raid response: Keep health even all fight so the heal is worthless, and use the channel to resolve toxins.
Everyone gains 1 to 3 toxin applications and must collide with a partner to total exactly 4.
Raid response: Call pairings fast: 1s find 3s, 2s find 2s. Leftovers pair across the room before the channel ends.
A large tank hit that increases the Guard's damage dealt until the tank targets swap.
Raid response: Cooldown the hit and take the swap on schedule.
Slime the Breath spat out returns to it after 4 seconds, hitting anyone in its path.
Raid response: Never stand between the slime and the boss; sidestep the green lines.
Slime forms an add that pulses raid damage until killed.
Raid response: It is the acid side's kill priority the moment it forms.
Droplets form and explode into Noxious Blast if nobody steps on them.
Raid response: Squish them early - one player per droplet.
A dispellable ticking Shadow debuff.
Raid response: Dispel next to existing puddles only.
A large tank hit that applies a stacking damage-over-time blood venom.
Raid response: Tank cooldowns, then swap before the stack compounds.
Hold the 40 yard separation, drop your puddles near existing ones on the edge, and treat Empowering Slam and Bloodvenom Injection as scheduled cooldown moments with a swap after.
Dispel Blighted Blood next to existing puddles, cover the Miasma group soaks, and split coverage so both camps always have healing - the intermission clash is the big raid-wide window.
Keep the two Guards' health even to make Vitriolic Stasis heal for nothing, and priority-target the Venom Coagulation add whenever it forms.
Know your toxin number before the clash and find your partner immediately. On Mythic, orange-circle players must connect only with other orange-circle players - touching anyone else deals heavy damage and a knockback.
Review available video breakdowns alongside the written assignments.
Compare current parses, talent choices, and gear for this encounter.
