Used by Nidus

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)

Abundant Mutation
Passive Augment: Nidus gains an additional 300 max stacks of Mutation. Undying has a 30s cooldown.
NidusPassive 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.
Ability dossier · Virulence
Use Virulence to set up Larva, or follow Larva with Virulence while enemies are vulnerable.
Use Virulence to set up Parasitic Link, or follow Parasitic Link with Virulence while enemies are vulnerable.
Use Virulence to set up Ravenous, or follow Ravenous with Virulence while enemies are vulnerable.
Stack the stats that actually move this ability’s needle, then Efficiency for uptime.
| Mission | How to Use It |
|---|---|
| Steel Path Survival / Defense / Disruption | Test whether Virulence still clears or enables clear when enemies are dense and overlevelled. |
| Mobile Defense / Excavation | Use Virulence to control or delete the swarm on the objective, then reposition. |
| Exterminate / Capture Speed Runs | Cast Virulence only when it saves time — skip it on empty tiles. |
| Spy / Rescue / Quiet Routes | If Virulence is loud or forces combat, save it for after the vault; if it’s stealth-friendly, use it to stay safe. |
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.