HoYoverse’s latest Honkai: Star Rail livestream on May 22, 2026, delivered a packed Special Program for Version 4.3 “The Lethe Below the Living”. While the stream covered a wide range of upcoming content, the biggest highlight for many fans was the official confirmation of Fate/stay night [Unlimited Blade Works] Collab Part 2, continuing the massive crossover that began in 2025.

Fate/stay night Collab Part 2 – “Echoes of the Grail”

The collaboration returns in full force during summer 2026 (targeted for July in Version 4.3 or 4.4). Building directly on the first phase’s “Sweet Dreams and the Holy Grail” event in Penacony, Part 2 introduces two new 5-star playable Servants:

  • Rin Tohsaka — Expected to shine as a powerful support or Erudition Path unit with mage-style mechanics and Command Seal synergies.
  • Gilgamesh — The King of Heroes, positioned as a high-damage Destruction Path DPS with Gate of Babylon AoE barrages and Enuma Elish ultimate potential.

Players will once again receive a free limited 5-star Servant just by logging in (likely Gilgamesh or a returning Archer), mirroring the generous rewards from Part 1. The story continuation will delve deeper into the Holy Grail War’s lingering effects within the Star Rail universe, with new Trailblaze Continuance chapters, themed events, exclusive Light Cones, and battle modes inspired by the Fate series. Kinoko Nasu’s supervision and Takashi Takeuchi’s artwork ensure the crossover remains faithful and high-quality.

Fans are already theorizing about voice line crossovers, potential new Noble Phantasms, and whether more Servants could appear in future phases.

Other Major Highlights from the May 22 Livestream

The Special Program wasn’t only about the Fate collab. HoYoverse revealed plenty of original content for Version 4.3, releasing on June 1, 2026:

  • New Story Arc: “The Lethe Below the Living” continues the narrative in Planarcadia, diving into deeper mysteries beneath the surface of this dreamlike realm.
  • New Limited Character: Mortenax Blade (Blade SP / enhanced Blade variant) — a powerful new 5-star unit with fresh gameplay mechanics and a striking redesign.
  • Exclusive Reward: Trailblazers who pull for Mortenax Blade can obtain the new “Karmic Fire of the Distant Shore” Trailblaze Outfit accessory during the Version 4.3 period.
  • Additional Teasers: Early hints at upcoming characters (including speculation around a “Himeko Nova” variant) and new endgame or event modes.
  • Banners & Events: Standard limited character and Light Cone banners, plus a full slate of limited-time events, Simulated Universe expansions, and login rewards.

The stream emphasized generous player rewards and quality-of-life improvements, keeping the momentum from previous versions strong while setting up larger story developments ahead.

Final Thoughts

Overall, the May 22 Special Program balanced fan-service nostalgia (via the Fate collab) with fresh original content, making Version 4.3 one of the most anticipated updates of the year. Whether you’re pulling for Gilgamesh and Rin or excited for Mortenax Blade’s new kit, there’s something for every Trailblazer.

The full character kits, exact banner schedules, and deeper story details will drop in the coming weeks through drip marketing and official channels.