The Arcanovoid Construct is one of the most demanding mounts in Midnight Season 1, designed as a pure solo challenge. Unlike reputation or RNG-based rewards, this mount is locked behind a high-end performance check inside the Delves system, making it a true skill-based collectible.
Visually, the mount represents a corrupted arcane construct infused with void energy - a rare hybrid design that reflects the influence of Nullaeus, the Season 1 Nemesis. It stands out not only for its appearance, but for what it represents: full mastery of solo Delves gameplay at the highest level.
To obtain it, you must defeat Nullaeus solo on the highest difficulty tier before the end of the season. This is tied to the achievement Let Me Solo Him: Nullaeus, making the mount time-limited and skill-gated.
To unlock the Arcanovoid Construct, you must defeat Nullaeus solo inside Torment’s Rise on the highest available difficulty tier during Midnight Season 1.
Nullaeus is not a standard boss - he is the Seasonal Delve Nemesis, designed specifically to test everything you’ve learned while progressing through Delves.
You cannot access Nullaeus immediately. You must first unlock his difficulty tiers:
This ensures only players capable of handling high-tier Delves can attempt the Nemesis fight.
Nullaeus is the Season 1 Delves Nemesis boss, and unlike regular encounters, he does not appear in standard dungeon or open-world content. Instead, he resides inside a dedicated Delve known as Torment's Rise, located in Voidstorm.
This location acts as his personal arena and is specifically designed for the Nemesis encounter. Once unlocked, you can challenge Nullaeus on two difficulty tiers - Tier 8 and Tier 11. While the lower difficulty is useful for learning mechanics, only the highest tier is relevant if your goal is to obtain the Arcanovoid Construct.
Before your first encounter, you will go through a short introductory questline that leads you into Torment’s Rise and explains the basics of the fight. Completing this chain and defeating Nullaeus on any difficulty rewards a small cosmetic item, but the real value comes from repeat attempts and progression toward higher-tier clears.
The Nemesis system also ties into multiple rewards beyond the mount, including titles, transmog appearances, and seasonal achievements. However, it is important to understand that only a full solo kill on the highest difficulty will grant the mount reward.
If you are heading there manually, use the following waypoint:
/way #2405 61.2 71.2 Torment's Rise
Torment's Rise map view
Torment's Rise entrance
At the start of Midnight Season 1, you will be able to pick up a short introductory questline from Valeera Sanguinar at the Delver’s Headquarters. This chain is available to level 90 characters and serves as your first introduction to the Delves Nemesis system.
It is important to understand that this questline is not required to unlock Torment’s Rise or to fight Nullaeus. You can access the boss purely through Delves progression. However, completing the chain is still highly recommended, as it provides additional context for the encounter and rewards a unique cosmetic item.
By finishing the full questline, you will receive the Dominating Victory toy, along with a clearer understanding of the mechanics and narrative behind Nullaeus and the Void corruption spreading through Delves.
The questline itself is short and can be completed quickly:
You can find all the information you need to defeat Nullaeus in our guide:
Nullaeus ChallengeOnce you successfully defeat Nullaeus on Tier 11 difficulty solo, you will automatically earn the Let Me Solo Him: Nullaeus achievement.
As part of this achievement, the Arcanovoid Construct mount is granted instantly. There are no additional requirements, no RNG, and no need to repeat the encounter.
This makes the mount a guaranteed reward for completing one of the most difficult solo challenges in Midnight Season 1.
Your companion setup plays a major role in this fight, and in most cases, Valeera should be configured as a healer. This gives you access to additional sustain and, more importantly, a reliable way to deal with debuffs such as Devouring Essence.
Nullaeus deals consistent melee and periodic burst damage, which can quickly overwhelm you if left unchecked. Running Valeera in healer mode helps stabilize incoming damage and allows you to focus on mechanics, positioning, and interrupts instead of pure survival.
That said, there is some flexibility. If your class already has strong self-healing and a dependable dispel, you can switch Valeera to a DPS setup to gain an extra interrupt and slightly faster kill times. However, this approach is riskier and requires much cleaner execution.
For optimal performance during the encounter, the following Valeera curios are recommended:
Because the Arcanovoid Construct comes from a solo kill of Nullaeus, the most useful addons are the ones that improve awareness, cast tracking, and arena control. This encounter is less about raw damage and more about reacting correctly to dangerous abilities, add waves, and movement-heavy phases.
Do not overload your UI before this fight. A clean screen with clear warnings is far more useful than stacking too many overlapping alerts.
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