Leaks for Honkai Star Rail version 4.7 reveal a new Ex-Eidolon system that adds upgrades to three older 5-star characters: Dan Heng Imbibitor Lunae, Jing Yuan, and Acheron. Sourced from leakers such as Full Stop Chan and Nanoka, the details remain subject to change until official confirmation.

How the Ex-Eidolon System Works

The system adds an extra slot on the Eidolon screen, unlocked with a new material. Each character can equip only one Ex-Eidolon. It functions like an E7 upgrade but does not require owning all six regular Eidolons. Unlocking it also brings UI and animation updates for the character.

  • Players can choose one free character and one free Ex-Eidolon in a version 4.7 activity.
  • The other two Ex-Eidolons come through top-up events or paid methods.
  • The free option is a direct activation and cannot be saved as an item for later use.

Leaked Effects

The following are partial effects reported via recent leaks (numbers may be placeholders):

Dan Heng Imbibitor Lunae

  • Increases the maximum number of Reverse Scales by 1.
  • For every 5 Skill Points consumed by allies, he launches a Follow-Up Attack that boosts his own damage by 200% for 3 turns, deals Imaginary damage equal to 400% of his ATK to all enemies, and grants 1 Reverse Scale.

This supports his Skill Point-heavy playstyle and adds consistent extra damage.

Jing Yuan

  • Lightning Lord hit limit increases by 20 stacks; once reached, it acts immediately.
  • Lightning Lord strengthens at battle start and after each of its actions.
  • Jing Yuan's damage increases by 200%; Skill or Ultimate adds an extra 6 or 12 Lightning Lord hits lasting 4 turns.

These changes aim to improve Lightning Lord frequency and overall damage output.

Acheron

  • When an ally attacks an enemy with the Gathering Red debuff, Acheron deals extra Lightning damage equal to 100% of her ATK and launches a Follow-Up Attack dealing 900% of her ATK Lightning damage to all enemies.
  • She gains 1 Remnant Dream and applies 1 Gathering Red stack to the enemy with the most stacks.
  • Triggers at most once per turn and resets at the start of the Yellow Springs turn.

This adds more frequent damage outside her Ultimate and helps stack generation through ally attacks.

What to Expect Next

Full confirmation is expected at the version 4.7 special program, with the update itself likely arriving in early to mid-November 2026. Because these remain leaks, wait for official information before planning resource spending. The Ex-Eidolon system offers a new path for older characters to stay relevant, though access to all three upgrades will depend on free selection choices and paid options.