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Strain Fever is a set mod that grants Helminth Chargers additional damage per Cyst.


Rank Damage Cost
0 +7% 6
1 +15% 7
2 +22% 8
3 +30% 9

Set Bonus[]

This mod is part of a set, whose set bonus increases with each additional mod equipped from that set.

Strain Set: The Helminth Charger grows cysts every X seconds that erupt every 25 seconds to spawn a maggot that seeks out and attacks enemies.

Mods Equipped Cysts Duration
1 2 6s
2 4 12s
3 6 18s
4 8 24s


  • When maximum amount of cysts are active provided all set mods are used, provides +240% damage on the helminth charger.
  • Strain Fever stacks additively with Mod TT 20px.png Maul resulting in a 570% damage increase with the maximum effect from the cysts.
  • As the Helminth Charger gains more cysts with Strain Fever equipped, it will also grow larger. Once the Helminth Charger has 8 active cysts provided all set mods are equipped, it becomes taller than any Warframe.

Patch History[]

Hotfix 29.5.4 (2020-11-25)

  • Fixed Nidus’ Virulence not benefiting from Volatile Maggot / Strain Maggots.

Update 25.1 (2019-06-05)

  • Fixed Strain Mod Maggots Energy color persisting as default.

Hotfix 25.0.8 (2019-05-31)

  • Fixed Maggots from Strain Mods not using the proper emissive colors.

Update 24.2 (2018-12-18)

  • Introduced.

Last updated: Hotfix 24.2.2 (2018-12-18)