Nullaeus in WoW Midnight: How the Season 1 Nemesis Worked
Nullaeus: the Season 1 Nemesis of Midnight
Nullaeus was the Nemesis of Midnight Season 1: a special Delve boss in Torment's Rise, unlocked through your progress in regular Delves. It had two difficulty tiers, and the reward for a solo kill on the top tier was one of the most prestigious of the season.
Data is current as of 11/13/2026. Season 2 began on August 18, and the key Nullaeus rewards, including the mount and the Fabled title, can no longer be earned. This guide is useful if you want to understand how a Delve Nemesis works, or if you are preparing for similar bosses in later seasons.
If you are playing current content, Ula'tek and The Unbinding of Kith'ix are closer to what you need, and Nullaeus is best read as a mechanics reference.
Where Torment's Rise was and how the tiers unlocked
The entrance sat in Torment's Rise, in the Voidstorm zone. You could simply fly there, with no quests or extra requirements to enter.
Access depended on Delves you had already cleared, and any Delve counted. There was one condition: finish the Delve with at least one life left. Finishing with zero lives did not count.
Tier 8. The first Nullaeus tier unlocked after clearing any other Delve at Tier 7 with lives remaining.
Tier 11. The harder tier, with new mechanics, unlocked after clearing a Delve at Tier 10 with lives remaining.
In practice the hardest part was these clears. Tier 7 and Tier 10 in the new Season 1 Delves demanded careful play and no risky pulls, since every lost life brought you closer to missing the requirement.
The flexibility was handy: if one Delve did not work out because of its mechanics or enemy mix, you could pick another at the same tier and meet the requirement there. For groups, it also meant nobody had to wait for a specific route to be learned.
Preparation: Valeera and gear
In Season 1 players tackled Nullaeus with Valeera, the Delve companion. Players advised keeping her as Healer: she saved runs in tough moments and could dispel one of the boss's key effects. Switching her to DPS only made sense once the mechanics felt familiar.
Players also advised raising curios to higher level and rarity ahead of time. With upgraded versions the same setup hit noticeably harder, so it paid to collect them before attempting Tier 11. They did not replace knowing the mechanics, but they gave a safety margin where lives were usually lost.
For safer runs, the usual picks were Mantle of Stars as the combat curio and Overflowing Voidspire as the utility curio. The first softened mistakes and boosted damage around you, and the second could proc several times in a long fight, boosting both your damage and the companion's healing. Some tried Porcelain Blade Tip on crit-heavy specs, but that was situational.
Patch 12.1 later made Valeera's poisons selectable in Delves, so part of the Season 1 advice on her setup may be outdated.
If you want a gear head start for hard content, Mythic+ brings items and the weekly vault much faster.
Fight mechanics according to player reports
Survival in the fight revolved around one ability, Emptiness of the Void. According to player reports, it went out roughly every 20 seconds after the first cast. If the cast can be interrupted, interrupt it every time. If not, you have to live through it with immunity or heavy damage reduction.
It helps to plan the order in advance: interrupt, immunity, interrupt, damage reduction, interrupt. That turns the fight into a loop with a clear rhythm, and mistakes show up right away.
The fight punished a missed interrupt hardest. Until the Emptiness of the Void timer feels natural, assign each defensive cooldown to a specific cast and keep a backup in case something slips. Raiders know this logic, but in a Delve it is just you, the boss and your companion, and there is no retry inside the fight.
The second key mechanic was Devouring Essence, a damage-over-time effect that Valeera dispelled as Healer. If the effect stayed on, the boss turned immune and summoned adds, and you had to kill them first.
Boss health | What appears | What to do |
|---|---|---|
75% | 2 Razor Shell Ravagers: they jump around, apply bleeds and drop danger circles | Kill them fast, stay out of the circles |
After 75% | Null lines sweep across the arena | Keep moving, do not stand in the lines |
50% | Spitting Ticks: they apply a stacking DoT | Kill them quickly before stacks pile up |
After 50% | A void hole orb drifts around and pulls you in | Stay away from it |
25% | Enslaved Void Caster: casts chains nonstop | Dodge circles, heal through it, interrupt early if you can |
Last 25% | No new mechanic | Stay disciplined and keep your focus |
Plan the interrupt at 25% around the timer of the next Emptiness of the Void, or you may be left without an interrupt when you need it. Once the boss becomes vulnerable again after an immune phase, return to your usual loop.
Nullaeus rewards and achievements
Everything below belongs to Season 1 and is no longer available.
Dominating Victory toy. Given for the seasonal quest Nulling Nullaeus.
Nullaeus Domaneye helm. A cosmetic for the My Shady Nemesis achievement, which required a kill on any tier.
Arcanovoid Construct mount. The reward for Let Me Solo Him: Nullaeus, a solo victory on the top tier.
Fabled Vanquisher of Nullaeus title. Granted for Fabled Let Me Solo Him: Nullaeus.
The main prize was the Fabled title: only the first 4,000 players in a region could earn it.
Fabled Let Me Solo Him: why it was so rare
The Fabled version of the achievement went only to the first 4,000 players in each region. The cap was lowered from 10,000 to 4,000 during the beta, which made the race even tighter. The fight had to be won completely solo on Tier 11, with no other players in the group, before the next Delve season began.
For most players the top tier was a serious test even without Fabled: a longer fight, tougher mechanics and gear that is almost always below comfortable at season start. For many, Tier 8 was enough: a kill on any tier counted for the helm, and that was a reasonable route.
The winners were those who prepared gear and companion ahead of time and showed up in the first days of the season. A race like this showed how much it pays to know the boss before it opens.
What to take from this guide now
Nullaeus showed how Blizzard builds seasonal Delve bosses: access through progress, two tiers, a hard reward for the fastest and cosmetics for everyone else. If later seasons build bosses similarly, this breakdown will apply there too.
Nullaeus itself is gone, but the approach carries over to other Delves and bosses. Clear the unlock requirement early. A healer companion covers mistakes, so switch it to damage only after you know the mechanics. And a planned order of interrupts and defensives is more reliable than reacting mid-fight.
If you are closing out your raid week, check The Venomous Abyss Normal, Heroic or Mythic modes. For weekly tasks without a raid, try Tidebound Grotto.