Honkai Star Rail 4.3 Adds Mortenax Blade and Deepens Planarcadia [2026 Update]

As originally reported by VG247, HoYoverse has officially unveiled Honkai: Star Rail Version 4.3, titled 'The Lethe Below the Living,' scheduled for release on June 1. The update expands the Planarcadia arc with a new narrative chapter that pushes players deeper into the World in Canvas storyline, continuing the game's ambitious world-building trajectory. The headline addition is Mortenax Blade as a new playable character, a move that will reshape roster construction for endgame content. HoYoverse's cadence of major version drops every six weeks continues to sustain one of the most active live-service ecosystems in the gacha RPG space. This announcement arrives during a period of heightened competition among live-service titles for player attention and spending, with cross-industry events like the illustrating how IP crossovers and timed content drops dominate the mobile and PC gaming calendar. The broader gaming economy is also navigating pricing debates, as highlighted by , making free-to-play models like Star Rail's gacha system an increasingly important counterpoint.