Honkai: Star Rail version 4.3 update ‘The Lethe Below the Living’ launches June 1

SHANGHAI, CHINA – May 22, 2026 – miHoYo, the acclaimed developer behind the global sensation Honkai: Star Rail, has officially announced a massive content expansion with its upcoming Version 4.3 update, titled "The Lethe Below the Living." Set to launch on June 1, this update promises to plunge players deeper into the cosmic mysteries of the Astral Express universe, featuring critical story revelations, the debut of a highly anticipated 5-star character, a suite of engaging in-game events, and an unprecedented collaboration with the iconic Fate/stay night [Unlimited Blade Works] series.

The announcement, delivered through a comprehensive special program and detailed overview, has ignited widespread anticipation among the vast player base. From the dramatic culmination of Mortenax Blade’s fate to the introduction of pivotal new lore figures and strategic gameplay additions, "The Lethe Below the Living" is poised to be one of Honkai: Star Rail‘s most impactful updates to date, cementing its position as a leading title in the live-service gaming landscape.

Main Facts: A Glimpse into the Coming Storm

The core of the "The Lethe Below the Living" update revolves around the continuation of the Planarcadia storyline, where the Trailblazer and Mortenax Blade will embark on separate, perilous journeys. Key highlights include:

Release Date: June 1st, 2026.
New 5-Star Character: Mortenax Blade, a Fire-Type character following the Path of Nihility, makes his official debut.
Narrative Climax: The Planarcadia arc reaches its dramatic conclusion, involving the Aeon Voracity, Lord Ravager Asat Pramad, and the millennia-old figure, Graphia.
Major Collaboration: A groundbreaking partnership with Fate/stay night [Unlimited Blade Works] will introduce new content and characters (Gilgamesh, Rin Tohsaka) on July 24, with Gilgamesh or Archer available for free.
New Events & Modes: "Gift of Tempered Blade," "Wispae Amusement Park," and the "Starward Mode" expansion for Memory of Chaos, Pure Fiction, and Apocalyptic Shadow.
Brand Partnership: Collaboration with UGREEN for exclusive merchandise and events.

This convergence of narrative intensity, character power, and high-profile collaborations underscores miHoYo’s commitment to delivering a continuously evolving and engaging experience for its global audience.

Chronology of Unveiling: From Narrative Climax to Cross-Universal Encounters

The rollout of Version 4.3 begins promptly on June 1st, with the immediate availability of "The Lethe Below the Living" update across all platforms. Players will be able to dive straight into the new story content, pushing forward the Planarcadia narrative that has captivated the community for previous versions.

Following the initial update, the first-half Warps will feature the debut of Mortenax Blade, alongside a rerun for the existing character Yao Guang. This period will also see the launch of the "Gift of Tempered Blade" event, offering an exclusive Trailblaze Outfit piece to players who acquire Mortenax Blade.

As the version progresses into its second half, players can anticipate the limited return of fan-favorite characters Cyrene and Phainon in their respective Warps. Concurrently, the "Wispae Amusement Park" event within the World in Canvas and the expanded "Starward Mode" challenges will become accessible, providing fresh gameplay loops and substantial rewards.

Looking ahead to July 24th, the eagerly awaited Fate/stay night [Unlimited Blade Works] collaboration is slated to ignite. This event promises a brand-new content update, featuring the introduction of Gilgamesh and Rin Tohsaka as collaboration characters. A significant draw for this collaboration is the opportunity for players to obtain Gilgamesh or Archer for free simply by logging into the game during the event period, an incentive that is expected to attract both existing players and new fans of the Fate series.

Further details regarding the UGREEN collaboration, including specific merchandise and event schedules, are expected to be unveiled gradually across multiple countries and regions, building anticipation for physical and digital engagements beyond the game itself.

Supporting Data: Delving into the Depths of Planarcadia and Beyond

The Version 4.3 update is a tapestry woven with intricate lore, innovative gameplay mechanics, and strategic character releases. miHoYo’s detailed overview provides ample "supporting data" that allows for a deeper understanding of the impending changes.

The Lethe Below the Living: Core Narrative

The central pillar of "The Lethe Below the Living" is the continuation and impending climax of the Planarcadia saga. The Trailblazer and Mortenax Blade will find their paths diverging as they venture into the enigmatic World in Canvas. This realm is described as being under the dual oppression of Lord Ravager Asat Pramad’s encroaching shadow and the binding seal of the Aeon Voracity.

A Deep Dive into Planarcadia’s Lore: The secret sealed deep within Planarcadia is promised to reach its official revelation. At the end of this picturesque yet perilous realm lies the "divine husk of the Aeon, the Voracity." This ancient entity, an embodiment of desire and devouring, holds the key to Mortenax Blade’s millennia-long struggle. Bearing the "flesh of Shuhu" from within two hundred thousand Joy Ascendants, Blade’s journey is a desperate wager: to harness the Voracity’s power to purge the Shuhu within his own body, thereby bringing a final end to his enduring curse. The narrative teases a profound existential choice, as Elio’s script remains blank on whether this action leads to death or rebirth for Blade, a fate the Trailblazer is destined to witness firsthand. This intricate web of ancient entities, personal curses, and cosmic gambles promises a narrative rich with philosophical undertones and high stakes.

The Enigma of Graphia and the Murata Lineage: Simultaneously, the Trailblazer will journey to Inkford Hermitage, a liminal space between life and the World in Canvas. Their mission: to warn Graphia, the "Mother of Imagenesis," about the threat posed by Asat Pramad. Graphia, an ancestor of the Murata family, has existed in this world for a full millennium, a testament to her profound connection to the cosmos. Her historical feat, encanvasing Ahatopia in Amber Era 2148 to repel the Demons From Beyond, came at a heavy cost: the "Weathering Curse" afflicting every subsequent generation of the Murata family. The official debut of this millennial figure is poised to unlock new answers regarding the Graphia family, Phantasmoon Games, and, most intriguingly, the numerous mysteries surrounding Himeko, a core member of the Astral Express crew. The implications of a direct link between Himeko and such an ancient, powerful lineage could reshape players’ understanding of her past and her destiny within the Honkai universe.

Introducing Mortenax Blade: A Destined Swordsman

The debut of Mortenax Blade as a 5-star Fire-Type character following the Path of Nihility is a major highlight. His lore paints a tragic figure: a swordsman once afflicted with mara, leading him to join the Stellaron Hunters and await his "death in the script." Version 4.3 marks a critical turning point in his destiny.

Character Kit Breakdown: Mortenax Blade’s combat mechanics are designed to be dynamic and impactful. His Ultimate, "Fornax Ex Corpore," deploys a unique Bounded Field, placing him into an enhanced state. While this field is active, all enemies suffer increased damage, setting the stage for significant offensive pushes. Upon entering this enhanced state, Blade unlocks a new Skill, allowing him to utilize a Sword Formation to deal even greater damage and gain a brand-new, more powerful Ultimate.

A core aspect of his kit is the "Charge" mechanic: every time an ally attacks an enemy, they inflict a debuff on the target and accumulate a special Charge for Mortenax Blade. Once this Charge is full, he automatically uses his Skill once and regenerates extra Energy. This passive generation of turns and energy suggests Mortenax Blade will be a high-action character, potentially enabling him to take multiple actions in a single turn cycle and synergize powerfully with allies who can trigger frequent attacks or debuffs. His Nihility path, combined with Fire typing, positions him as a potentially potent debuffer and damage dealer, capable of slotting into various team compositions that prioritize consistent enemy pressure.

Engaging In-Game Events and Challenge Expansions

Version 4.3 brings a robust lineup of events and enhancements to existing challenge modes, ensuring a fresh and rewarding experience for players.

"Gift of Tempered Blade": This event offers a unique incentive for players to acquire the new 5-star character. Upon obtaining Mortenax Blade through Warping, players will receive a brand-new Trailblaze Outfit piece, "Karmic Fire of the Distant Shore," for free. This adds a cosmetic reward directly tied to character acquisition, appealing to both collectors and those seeking to customize their Trailblazer.
"Wispae Amusement Park": Set within the World in Canvas, this event tasks the Trailblazer with the role of "Chief Planner" for an IPC-sponsored amusement park. Players will map out visitor routes and strategically place amusement rides across different themed zones to attract wispae. This mini-game style event promises a blend of strategy and creativity, offering a lighthearted diversion from the main story while still providing valuable in-game rewards.
"Starward Mode": A significant enhancement to Honkai: Star Rail‘s endgame content, "Starward Mode" will be added to three existing challenge gameplay modes: Memory of Chaos, Pure Fiction, and Apocalyptic Shadow. This new mode requires the Trailblazer to set up three distinct teams to tackle three different stages. The introduction of a three-team requirement elevates the strategic depth, demanding a wider roster of well-built characters and more thoughtful team compositions. Clearing each gameplay with full stars will reward an extra 100 Stellar Jades per phase, amounting to an additional 300 Stellar Jades in total across all three modes. This substantial increase in Stellar Jade rewards will be a major draw for veteran players seeking to maximize their resources for future Warps.

Strategic Collaborations: Expanding Reach and Engagement

miHoYo continues its strategy of cross-industry and cross-IP collaborations, enhancing Honkai: Star Rail‘s visibility and appeal.

UGREEN Partnership: The official announcement of a collaboration with UGREEN, a prominent electronics accessory brand, signals an expansion into tangible merchandise and lifestyle products. While specific details are forthcoming, such partnerships typically involve co-branded charging accessories, peripherals, and themed events that bridge the digital and physical worlds for fans. This move strengthens Honkai: Star Rail‘s brand presence beyond the gaming sphere.
Fate/stay night [Unlimited Blade Works] Crossover: Arguably the most impactful announcement, the Fate/stay night [Unlimited Blade Works] collaboration on July 24 is a monumental event. This partnership brings together two titans of anime and gaming culture. The revelation of Gilgamesh and Rin Tohsaka as new collaboration characters has sent ripples of excitement through both fanbases. The unprecedented offer to obtain Gilgamesh or Archer for free simply by logging in is a powerful incentive designed to attract new players who are fans of the Fate series and to reward existing players with a high-value character. This collaboration represents a strategic move by miHoYo to tap into the immense popularity and established lore of the Fate universe, potentially introducing Honkai: Star Rail to a vast, receptive audience and enriching its own narrative possibilities through a limited-time event.

Official Responses: miHoYo’s Vision for the Future

miHoYo’s detailed announcements serve as a direct communication of their vision for Honkai: Star Rail. The comprehensive overview provided by the developer highlights a commitment to narrative depth, character diversity, and continuous engagement through events and collaborations.

The emphasis on the "finale of Blade’s age-old fate" and the "official revelation" of Planarcadia’s secrets underscores miHoYo’s dedication to delivering impactful story beats that resonate with players. The careful crafting of Mortenax Blade’s abilities, allowing for strategic depth and team synergy, reflects their understanding of the game’s evolving meta and player preferences.

Furthermore, the introduction of "Starward Mode" with its increased Stellar Jade rewards directly addresses player feedback for more challenging and rewarding endgame content. This demonstrates a responsive development philosophy aimed at fostering long-term player retention.

The strategic collaborations with UGREEN and, most significantly, Fate/stay night [Unlimited Blade Works], are clear indicators of miHoYo’s ambitious growth strategy. By partnering with globally recognized brands and IPs, they aim to expand Honkai: Star Rail‘s cultural footprint, attract diverse audiences, and offer unique, cross-media experiences that distinguish the game in a competitive market. The generosity of offering a free 5-star Fate character like Gilgamesh or Archer is a powerful statement of intent, designed to maximize player acquisition and celebrate the crossover event with the community.

Implications: Reshaping the Stellar Rail and Beyond

The "The Lethe Below the Living" update carries significant implications for Honkai: Star Rail, its community, and miHoYo’s broader strategic direction.

Narrative and Lore Expansion: The promised revelations about Planarcadia, the Aeon Voracity, and the mysterious Graphia are set to profoundly deepen the game’s lore. The connection between Graphia, the Murata family, and Himeko could rewrite foundational elements of Honkai: Star Rail‘s universe, potentially linking it more explicitly to miHoYo’s other Honkai titles or establishing new, overarching mythologies. This narrative density is crucial for keeping players invested in the ongoing story of the Astral Express.

Character Meta Shift: Mortenax Blade, as a 5-star Nihility character with unique debuff and enhanced state mechanics, is likely to introduce new team compositions and strategies. His ability to gain extra turns and energy through ally actions could make him a cornerstone of hyper-carry setups or enable new synergistic interactions with existing characters. The influx of new team requirements for "Starward Mode" further encourages players to diversify their rosters and invest in a broader array of characters, promoting a healthier and more dynamic meta.

Player Engagement and Retention: The array of events, from the strategic "Wispae Amusement Park" to the challenging "Starward Mode," provides diverse gameplay experiences that cater to different player preferences. The increased Stellar Jade rewards from "Starward Mode" are a powerful incentive for veteran players, while the "Gift of Tempered Blade" offers immediate gratification for new character acquirers. These initiatives are vital for maintaining high levels of player engagement and ensuring long-term retention in the competitive gacha market.

Market Expansion and Brand Synergy: The Fate/stay night [Unlimited Blade Works] collaboration is a game-changer. By offering a free high-value character, miHoYo is strategically lowering the barrier to entry for Fate fans, potentially converting a massive new demographic into Honkai: Star Rail players. This cross-pollination of fanbases not only boosts player numbers but also reinforces Honkai: Star Rail‘s reputation as a premium title capable of securing top-tier collaborations. The UGREEN partnership, while less directly tied to in-game content, enhances brand visibility and diversifies revenue streams through merchandise, further embedding Honkai: Star Rail into popular culture.

MiHoYo’s Dominance in Live-Service Gaming: This comprehensive update, with its blend of deep narrative, strategic gameplay, and high-profile collaborations, solidifies miHoYo’s position as a leader in the live-service gaming space. Their ability to consistently deliver high-quality content, respond to player feedback, and execute ambitious cross-IP ventures demonstrates a robust development and marketing strategy that continues to drive the success of Honkai: Star Rail and its other titles. The "The Lethe Below the Living" update is not just a content patch; it’s a strategic declaration of intent, promising an exhilarating future for the trailblazers of the Star Rail.

Honkai: Star Rail is currently available on PlayStation 5, PC (via client download and Epic Games Store), iOS (App Store), and Android (Google Play). Players are encouraged to watch the Version 4.3 Update Trailer and Special Program, available in multiple languages, to get a comprehensive visual overview of the exciting content arriving on June 1st.