Theorylytics

Virulence

Used by Nidus

Ability1
Energy25

Virulence

Rupture the ground with a damaging fungal growth that steals energy from each enemy it strikes. For every five enemies hit, the Infestation mutates, multiplying its destructive force.

Introduced in Update 19.5 (2016-12-22)

Ability stats

Strength
  • See in-game / wiki ability card for rank values
Duration
  • See in-game / wiki ability card for rank values
Range
  • See in-game / wiki ability card for rank values
Misc
  • Rupture the ground with a damaging fungal growth that steals energy from each enemy it strikes.

Info

  • Virulence is Nidus’s ability 1.
  • Rupture the ground with a damaging fungal growth that steals energy from each enemy it strikes.
  • Use it with the rest of the kit — especially Larva, Parasitic Link — instead of casting it in isolation.
  • Ability Strength, Duration, Range, and Efficiency each matter differently; check Mod Scaling below before dumping all four.

Augment

9

Abundant Mutation

Passive Augment: Nidus gains an additional 300 max stacks of Mutation. Undying has a 30s cooldown.

Nidus
Open augment →
Abundant Mutation

Passive Augment: Nidus gains an additional 300 max stacks of Mutation. Undying has a 30s cooldown.

Max rank drain ~9; see rank table on the augment page.

Open full augment page →

Cast Changes

  1. Modifies Virulence with: Passive Augment: Nidus gains an additional 300 max stacks of Mutation.
  2. Rank up the augment to unlock the full effect values.
  3. Costs a mod slot (and capacity) — only equip it when the change matters for your loop.

Worth the Slot?

  1. Worth it when the augment’s change is central to how you play Nidus.
  2. Skip it if the base Virulence already does what you need and you’d rather keep the slot for survivability or strength.

Tips & Tricks

  • Read the battlefield first — cast Virulence when it actually solves the room, not on cooldown habit.
  • Pair Virulence with movement and energy economy so you’re not stranded after a big spend.
  • On Steel Path, confirm whether Virulence still carries without strip, Viral, or a squad buff.
  • If you never press 1, it’s the first Helminth candidate on Nidus.

Ability dossier · Virulence

Verified 2026-07-22

Synergies

  • VirulenceLarva

    Use Virulence to set up Larva, or follow Larva with Virulence while enemies are vulnerable.

  • VirulenceParasitic Link

    Use Virulence to set up Parasitic Link, or follow Parasitic Link with Virulence while enemies are vulnerable.

  • VirulenceRavenous

    Use Virulence to set up Ravenous, or follow Ravenous with Virulence while enemies are vulnerable.

Mod Scaling

Strength

Strength matters if Virulence scales effect power; otherwise dump it for other stats.

Duration

Duration is low priority on Virulence unless an augment or lingering effect needs it.

Range

Range is usually dumpable on Virulence unless you feel the hitbox is too tight.

Efficiency

Virulence costs energy each cast — Efficiency (or strong regen) keeps the loop comfortable on long missions.

Priority

Stack the stats that actually move this ability’s needle, then Efficiency for uptime.

Mission Use Cases

MissionHow to Use It
Steel Path Survival / Defense / DisruptionTest whether Virulence still clears or enables clear when enemies are dense and overlevelled.
Mobile Defense / ExcavationUse Virulence to control or delete the swarm on the objective, then reposition.
Exterminate / Capture Speed RunsCast Virulence only when it saves time — skip it on empty tiles.
Spy / Rescue / Quiet RoutesIf Virulence is loud or forces combat, save it for after the vault; if it’s stealth-friendly, use it to stay safe.

Comparisons

  • VS

    Vs similar tools on other frames — Virulence is tuned for Nidus’s loop — don’t judge it as a standalone subsume without the rest of the kit.

Other Nidus abilities