Boss profile
Mythic Crown of the Cosmos.
Three phases through demibosses, a void-clone Alleria, and the real Alleria.
Death hotspots
The worst five-second death windows in this fight.
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Encounter context
About this encounter
Crown of the Cosmos is the Voidspire's final encounter, a three-stage fight through demibosses, a split tanking phase against Alleria and her void clone, and a single-target phase on Alleria. Each stage layers in mechanics from the prior one rather than replacing them.
What kills pulls
Damage spikes line up with Void Expulsion pool detonations and add deaths that apply Corrupting Essence to nearby players. Silverstrike Arrow ricochets and Aspect of the End tether breaks produce the largest raidwide pulses on the chart. Deaths cluster when adds reach Alleria and stack her damage buff, and when Rift Slash debuffs accumulate without a tank swap.
How to read this chart
Average damage taken
The primary line shows the average damage taken across all logged pulls at each second of the fight. Use it as a baseline to find the consistent spike windows.
Standard deviation band
The wider band covers one standard deviation either side of the average. About 68% of pulls fall inside it. A wide band points to mechanics with variable outcomes: avoidable damage some players miss, random targeting, or differences in mitigation.
95% confidence interval
The narrower band is our confidence in the average estimate. A tight band means a lot of consistent logs at that second. A wider band points to thinner data or inconsistent execution.
Deaths per pull
The death bars on the right axis show the average number of player deaths logged at each second. They usually trail the damage spike by a few seconds, since deaths follow whatever just hit the raid.
Hotspot windows
The table under the chart picks the top death seconds and groups them into windows. Useful for matching cooldowns to the moments where pulls actually fall apart.
Source and selection
Data is aggregated from public progression logs (first successful kills) and is anonymized before display.