Defense Nucleus

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BgBoss.pngDefense Nucleus.png
SotV Icon.pngSotV Icon.pngSurvivors of the Void - DLC Content
Defense Nucleus is part of the Survivors of the Void DLC. It is only available if the DLC is enabled when starting a run.
Click for more info.
Defense Nucleus
Defense Nucleus.png
Summon an Alpha Construct on killing an elite.
Killing elite monsters spawns an Alpha Construct with bonus 300% damage and 300% health. Limited to 4 (+4 per stack).
Rarity Boss (Xi Construct)
Category Damage
OnKillEffect
Corrupted SotV Icon.pngSotV Icon.pngSurvivors of the Void - DLC Content
Newly Hatched Zoea is part of the Survivors of the Void DLC. It is only available if the DLC is enabled when starting a run.
Click for more info.
Newly Hatched Zoea.png Newly Hatched ZoeaBgVoid.pngNewly Hatched Zoea.pngSotV Icon.pngSotV Icon.pngSurvivors of the Void - DLC Content
This content is part of the Survivors of the Void DLC. It is only available if the DLC is enabled when starting a run.
Click for more info.
Newly Hatched Zoea
Periodically recruit allies from the Void. Corrupts all yellow items.

Every 60 (-50% per stack) seconds, gain a random Void ally. Can have up to 1 (+1 per stack) allies at a time. Corrupts all yellow items.
Stats
Stat Value Stack Add
Max Constructs 4 Linear +4
Alpha Construct (Ally)
Alpha Construct (Ally).png
Health 400 (+120 per level)
Damage 48 (+9.6 per level)
Speed 0 m/s

The Defense Nucleus is a boss item in Risk of Rain 2, dropped by the SotV Icon.pngSotV Icon.pngSurvivors of the Void - DLC Content
Xi Construct is part of the Survivors of the Void DLC. It is only available if the DLC is enabled when starting a run.
Click for more info.
Xi Construct.png Xi ConstructXi Construct.pngSotV Icon.pngSotV Icon.pngSurvivors of the Void - DLC Content
This content is part of the Survivors of the Void DLC. It is only available if the DLC is enabled when starting a run.
Click for more info.
Xi Construct
Defense SystemHP: 2800 (+840 per level)
Damage: 13 (+2.6 per level)
Class: Ranged
Speed: 60 m/s
Armor: 15
, added in the Survivors of the Void expansion.

Whenever the holder defeats an Elite monster, one friendly SotV Icon.pngSotV Icon.pngSurvivors of the Void - DLC Content
Alpha Construct is part of the Survivors of the Void DLC. It is only available if the DLC is enabled when starting a run.
Click for more info.
Alpha Construct (Ally).png Alpha ConstructAlpha Construct.pngSotV Icon.pngSotV Icon.pngSurvivors of the Void - DLC Content
This content is part of the Survivors of the Void DLC. It is only available if the DLC is enabled when starting a run.
Click for more info.
Alpha Construct
HP: 100 (+30 per level)
Damage: 12 (+2.4 per level)
Class: Ranged
Speed: 0 m/s
Armor: 0
is spawned at that location, with greatly increased stats. Up to 4 (+4 per stack) can be spawned.

Notes

  • The Alpha Constructs do not disappear after some time, or lose health over time. This makes them permanent unless killed by enemies.
    • Due to the global ally limit, high stacks of this item may prevent other allies from spawning, e.g., Empathy Cores.png Empathy CoresBgBoss.pngEmpathy Cores.pngEmpathy Cores
      Recruit a pair of Solus Probes that gain power with more allies.

      Every 30 seconds, summon two Solus Probes that gain +100% (+100% per stack) damage per ally on your team.
      and SotV Icon.pngSotV Icon.pngSurvivors of the Void - DLC Content
      Newly Hatched Zoea is part of the Survivors of the Void DLC. It is only available if the DLC is enabled when starting a run.
      Click for more info.
      Newly Hatched Zoea.png Void AlliesBgVoid.pngNewly Hatched Zoea.pngSotV Icon.pngSotV Icon.pngSurvivors of the Void - DLC Content
      This content is part of the Survivors of the Void DLC. It is only available if the DLC is enabled when starting a run.
      Click for more info.
      Newly Hatched Zoea
      Periodically recruit allies from the Void. Corrupts all yellow items.

      Every 60 (-50% per stack) seconds, gain a random Void ally. Can have up to 1 (+1 per stack) allies at a time. Corrupts all yellow items.
      .
    • The Artifact of Honor makes this item very useful, as the player can accumulate an army of Alpha Constructs over the course of a stage.
  • The Forgive Me Please.png Forgive Me PleaseBgEquipment.pngForgive Me Please.png45sForgive Me Please
    Throw a cursed doll that repeatedly triggers your 'On Kill' effects.

    Throw a cursed doll out that triggers any On-Kill effects you have every 1 second for 8 seconds.
    will never trigger the item's effect, even if the HonorArtifact of Honor is enabled.
  • Alpha Constructs spawned by the Defense Nucleus can become SotV Icon.pngSotV Icon.pngSurvivors of the Void - DLC Content
    Voidtouched is part of the Survivors of the Void DLC. It is only available if the DLC is enabled when starting a run.
    Click for more info.
    Status AffixVoid.png VoidtouchedStatus AffixVoid.pngSotV Icon.pngSotV Icon.pngSurvivors of the Void - DLC Content
    This content is part of the Survivors of the Void DLC. It is only available if the DLC is enabled when starting a run.
    Click for more info.
    Voidtouched (Affix Buff)
    Gain the power of a Voidtouched Elite.Collapse on hit and block one hit every 15 seconds.
    by a SotV Icon.pngSotV Icon.pngSurvivors of the Void - DLC Content
    Void Infestor is part of the Survivors of the Void DLC. It is only available if the DLC is enabled when starting a run.
    Click for more info.
    Void Infestor.png Void InfestorVoid Infestor.pngSotV Icon.pngSotV Icon.pngSurvivors of the Void - DLC Content
    This content is part of the Survivors of the Void DLC. It is only available if the DLC is enabled when starting a run.
    Click for more info.
    Void Infestor
    HP: 45 (+14 per level)
    Damage: 11 (+2.2 per level)
    Class: Melee
    Speed: 14 m/s
    Armor: 0
    , and will no longer help the Survivors. These are particularly dangerous since these allied Alpha Constructs are much stronger than a normal one.
  • Unlike most other ally-summoning items, the Defense Nucleus is given to Engineer.png Engineer'sEngineer.pngEngineerThe Engineer is a unique class that requires planning and positioning to be successful.
    Class: Ranged
    HP: 130 (+39 per level)
    Damage: 14 (+2.8 per level)
    Armor: 0
    Umbra: Fortification Expert
    turrets. Each turret tracks its own allied Alpha Construct limit separately, so a turret can spawn up to 4 extra Alpha Constructs per stack of Defense Nucleus. Turrets must be the ones to land the killing blow on Elites to spawn their own Alpha Constructs, however. If the turrets and Engineer can kill enough elites, they can have a total of 12 Alpha Construct allies with just a single Defense Nucleus.
    • The SotV Icon.pngSotV Icon.pngSurvivors of the Void - DLC Content
      Lysate Cell is part of the Survivors of the Void DLC. It is only available if the DLC is enabled when starting a run.
      Click for more info.
      Lysate Cell.png Lysate CellBgVoid.pngLysate Cell.pngSotV Icon.pngSotV Icon.pngSurvivors of the Void - DLC Content
      This content is part of the Survivors of the Void DLC. It is only available if the DLC is enabled when starting a run.
      Click for more info.
      Lysate Cell
      Add an extra charge of your Special skill. Corrupts all Fuel Cells.

      Add +1 (+1 per stack) charge of your Special skill. Reduces Special skill cooldown by 33%. Corrupts all Fuel Cells.
      gives Engineer an extra turret, increasing the max potential to 16 Alpha Constructs.
    • If a turret is a replaced, its deployable count reference will be lost while its spawned Alpha Constructs will not be affected. The new turret will then be able to spawn more Alpha Constructs.

Lore

"Excellent!  How did you find it?"

"We took down one of those floating fortune tellers--"

"Xi Construct."

"Sure.  Anyway, we took it down and recovered the sample."

"May I see it?"

"This is it."

"This?  What happened?  I thought you said it was glowing."

"That's right.  It was.  Before I scrapped it."

"...You ...what?"

"I scrapped it."

"You were finally able to recover a sample from the Xi Construct, and you scrapped it?  Do you realize monumental importance of the samples we've been gathering?"

"I realize the monumental danger.  I've read the lab files.  Daimera's crippled in one hand.  Veirs was THIS close to electrocuting herself.  After Fitz nearly KILLED his ENTIRE team for a VASE, you think I'm going to haul a mysterious glowing orb back here?  HELL.  NO."

"...Well, what's done is done.  I guess I'll analyze what's left.  Anything else?"

"Yeah, I was thinking we could call it a 'Defense Nucleus'."

"..."

"In the file."

"No."

Version History

Survivors of the Void
  • (Undocumented) Added New Item: Defense Nucleus

Trivia

  • This item's logbook entry references a pattern in most boss item logbook entries where multiple technicians injure themselves (or come close) while attempting to study the items, such as hand injury (Shatterspleen.png ShatterspleenBgBoss.pngShatterspleen.pngShatterspleen
    Critical strikes always bleed enemies. Bleeding enemies now explode.

    Gain 5% critical chance. Critical Strikes bleed enemies for 240% base damage. Bleeding enemies explode on death for 400% (+400% per stack) damage, plus an additional 15% (+15% per stack) of their maximum health.
    ), electrocution (Genesis Loop.png Genesis LoopBgBoss.pngGenesis Loop.pngGenesis Loop
    Fire an electric nova at low health.

    Falling below 25% health causes you to explode, dealing 6000% base damage. Recharges every 30 / (2 +1 per stack) seconds .
    ), and siphoning (Mired Urn.png Mired UrnBgBoss.pngMired Urn.pngMired Urn
    Siphon health from nearby enemies while in combat.

    While in combat, the nearest 1 (+1 per stack) enemies to you within 13m will be 'tethered' to you, dealing 100% damage per second, applying tar, and healing you for 100% of the damage dealt.
    ).