Operation: Plague Star 2025: Confronting the Infested Threat on the Plains of Eidolon

The digital cosmos is once again under siege, as Operation: Plague Star makes its anticipated return, challenging players to confront a burgeoning Infested threat on the Plains of Eidolon. This critical, limited-time event is currently live and will conclude on September 24 at 11 a.m. ET, urging all capable participants to rally against a rapidly expanding, pustulating boil that emerged following a devastating meteorite impact. With the vital toxin needed for its destruction held by the uncooperative Councilor Vay Hek, players must navigate a series of challenging bounty missions to secure the necessary antidote and prevent the infestation from engulfing the nearby settlement of Cetus. Engage with Konzu to begin your mission, earn valuable Operational Supply Standing, and unlock a host of exclusive rewards before the infestation spirals out of control.
The Infested Scourge Returns to the Plains
The tranquil yet war-torn landscapes of the Plains of Eidolon have once again become the epicenter of a grave threat. Following the recent impact of an Infested meteorite, a colossal, pustulating boil has manifested, growing ominously and threatening to engulf the vital Ostron settlement of Cetus. This latest iteration of Operation: Plague Star calls upon all available Tenno to unite and neutralize this biological menace before its insidious tendrils spread irreversibly across the landscape. The event is a race against time, with the window for participation closing definitively on September 24 at 11 a.m. ET.
The Infested, a relentless and grotesque faction, represent a biological horror that consumes and corrupts all in its path. Their presence on the Plains of Eidolon is not merely a localized issue; the expanding boil poses an existential threat to the Ostrons and their way of life. The core objective of this operation is clear: eliminate the primary source of the infection, the gigantic boil, and secure the safety of Cetus.
Councilor Vay Hek's Obstruction
While the threat looms large, a critical obstacle stands in the way of a swift resolution. Councilor Vay Hek, a prominent and often antagonistic figure, is known to possess a potent toxin capable of destroying the Infested boil. However, true to his nature, Vay Hek has no intention of readily offering his aid. This means that participants cannot simply request the antidote; they must actively engage in operations to acquire the necessary toxin through alternative means. This adds a layer of complexity and urgency to the mission, transforming it from a straightforward eradication effort into a multi-faceted challenge involving resource acquisition and strategic planning.
Initiating the Mission: Speaking with Konzu
To embark on this critical mission, players must travel to Cetus and seek out Konzu, the Ostron bounty giver. Konzu serves as the central point of contact for Operation: Plague Star, offering the specific bounty missions that comprise the event. Engaging in dialogue with him will unlock the series of objectives necessary to begin combating the Infested threat. These bounty missions are designed to guide players through the process of acquiring the essential components needed to craft the anti-Infested toxin and ultimately deploy it against the boil.
Upon accepting the Plague Star Bounty, players will be tasked with a series of objectives that typically involve navigating the Plains of Eidolon, confronting Infested forces, and gathering critical resources. Each completed stage contributes to the overall effort to contain and eradicate the boil. Success in these missions is paramount, as it directly impacts the ability to earn Operational Supply Standing, the event-specific currency that grants access to exclusive rewards.
Earning Operational Supply Standing and Understanding Bounty Tiers
The primary progression system within Operation: Plague Star revolves around accumulating Operational Supply Standing. This standing acts as a measure of a player's contribution to the event and is exchanged for the special rewards available only during this limited-time operation. The amount of standing earned is directly tied to the completion of the bounty missions, with higher-tier bounties offering significantly greater rewards.
The event features distinct bounty tiers, each presenting varying levels of challenge and offering scaled rewards. Understanding these tiers is crucial for maximizing efficiency and tailoring participation to individual player capabilities and desired outcomes:
- Tier 1: No Prerequisites
This entry-level bounty is accessible to all players, regardless of their progression or gear. It serves as an excellent starting point for those new to the event or looking for a more relaxed experience. While the requirements are minimal, the rewards provide a solid foundation for accumulating standing.
- Base Standing: 1000
- Bounty Bonus Completion: 50
- Tier 2: Enhanced Challenge and Rewards
Stepping up in difficulty, Tier 2 bounties require players to come prepared with specific consumables. The need for 1x Eidolon Phylaxis and 1x Infested Catalyst introduces a strategic element, as these items must be acquired or crafted prior to embarking on the mission. The increased effort is compensated with substantially higher standing gains, making this tier more appealing for players seeking to progress faster through the reward tiers.
- Requirements: 1x Eidolon Phylaxis + 1x Infested Catalyst
- Base Standing: 3050
- Bounty Bonus Completion: 187
- Tier 3: The Steel Path Test
Designed for veteran players and those who thrive on the highest difficulties, Tier 3 bounties integrate the challenge of the Steel Path. This advanced difficulty mode significantly amplifies enemy strength and resilience, demanding optimized loadouts and coordinated team play. In addition to Steel Path eligibility, participants must also provide 1x Eidolon Phylaxis and 1x Infested Catalyst. This tier offers the most generous standing rewards, making it the most efficient path for highly experienced players to unlock all event items.
- Requirements: 1x Eidolon Phylaxis + 1x Infested Catalyst + Steel Path Eligibility
- Base Standing: 3650
- Bounty Bonus Completion: 225
Players are encouraged to assess their readiness and choose the bounty tier that best suits their current capabilities and resource availability. Collaborating with a squad can significantly enhance success rates, particularly for the more challenging Tier 2 and Tier 3 bounties, ensuring efficient acquisition of Operational Supply Standing.
Exclusive Rewards Awaiting Participants
Operation: Plague Star brings with it a fresh assortment of rewards, available only for a limited time through the event's standing system. These items range from unique cosmetic enhancements to valuable utility components, providing strong incentives for participation. The newly added rewards include:
- Hemocyte Glyph: A personalized emblem to display on player profiles or in-game items, featuring imagery related to the Infested boss.
- Hemocyte Sigil: A cosmetic overlay that can be applied to a Warframe, showcasing allegiance or achievement during the event.
- Hemocyte Decoration: An item for personal ship or dojo customization, allowing players to commemorate their efforts against the Infested.
- 1x Omni Forma: A highly versatile item available for purchase, allowing players to reset and reconfigure polarity slots on any weapon, Warframe, or companion, offering unparalleled build flexibility.
- Protosomid Shoulder Guard: A unique cosmetic armor piece that can be equipped on Warframes, offering a distinctive aesthetic.
- Aspirus Ephemera: A rare cosmetic effect that emanates from a Warframe, providing a striking visual aura.
- Cryptanaut Necramech Helmet: A specialized helmet for Necramechs, allowing for customization of these powerful combat mechs.
- Earth Console: A decorative console item, ideal for personal ship or dojo customization, reflecting themes from Earth.
- Murex Console: Another decorative console item, inspired by the distinctive aesthetics of the Murex, a prominent Infested spacecraft.
These rewards are exclusive to Operation: Plague Star and represent a unique opportunity for players to enhance their collections, customize their Warframes and Necramechs, and acquire a valuable Omni Forma. The limited availability underscores the importance of participating before the event concludes on September 24.
Conclusion: A Call to Arms
Operation: Plague Star is more than just another event; it is a critical defense against a persistent and evolving threat. The Infested boil on the Plains of Eidolon poses a clear and present danger to Cetus, and only through the collective efforts of the Tenno can this crisis be averted. With a clear deadline of September 24 at 11 a.m. ET, the window for action is finite. Engage with Konzu, prepare for the challenges of the bounty tiers, and secure the unique rewards that await. The fate of Cetus and the Plains of Eidolon rests on your shoulders.