Sentient immunity to the Infestation is exploited with this refined phylaxis. Formulated specifically to combat Infested boils.

—In-Game Description

The Eidolon Phylaxis is a consumable Gear item unique to the Operation: Plague Star Event. When equipped, it is consumed during the Thrax Toxin mixing stage, and has the effect of granting additional Operational Supply Standing at the completion of the Plague Star Bounty, at the cost of increased mission difficulty.


The reusable blueprint is acquired from Nakak in Cetus for ReputationLargeBlack2,000 and Credits644,000 upon reaching the rank of Collaborator with the Operational Supply Syndicate.

5x Eidolon Phylaxis

Manufacturing Requirements

Time: 1 min
Rush: Platinum64 5
MarketIcon Market Price: N/A Blueprint2 Blueprints Price: Credits644,000 + ReputationLargeBlack2,000

How To Use

  • During the Thrax Toxin mixing phase, approach the Toxin Mixer, bring up the Gear wheel (default Q ) and select the Eidolon Phylaxis, which will automatically insert a Phylaxis into the mixer. This process can be performed up to 4 times during the mixing phase.


  • As with Infested Catalyst, each Phylaxis mixed in will add ReputationLargeBlack250 to the final reward upon completing the Bounty. Mixing in the maximum of 4 Catalysts and 4 Phylaxis will result in a bonus of ReputationLargeBlack2,000 on top of the base ReputationLargeBlack1,000 for a total of ReputationLargeBlack3,000.
  • In addition, each Phylaxis added will raise the level of the Infested enemies encountered during the final stage of the Plague Star bounty up to 30, and increase the number and frequency of spawns.


  • A full squad of four can save up on Phylaxis by having each person contribute to the mixer. Each player thus spends only one Phylaxis, while still filling up the mixer with the full four Phylaxis necessary to raise the final Operational Supply Standing reward to 1,000.


  • Phylaxis is a medical term that usually refers to defenses against infections. It is often used as a suffix to denote protection from various conditions, e.g. prophylaxis.
    • Given the circumstances of its use, the Eidolon Phylaxis' name may be derived from the above term as well as Anaphylaxis, a severe allergic reaction characterized by rashes and swelling of the throat and mouth, among other symptoms. This gives some insight as to how the Phylaxis may work in-universe.

See Also

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