Secret Letter Rotation Notice — Duet Night Abyss Steam update #101581

Dear Phoxhunter,The Secret Letters will undergo a rotation after the update on December 23, 2025 (UTC +8). The rotation rules are as follows:December 23, 2025 (UTC +8):• \ and \ will replace \ and \ as the limited-time rewards in Immersive Theatre.• \ will replace \ as the challenge reward in Nocturnal Echoes.• \ will replace \ as the challenge reward in Nocturnal Echoes.• \ will replace \ as the challenge reward in Nocturnal Echoes.• \, \ and \ will become permanently exchangeable in the \ exchange shop.Special Note: The Nocturnal Echoes reward rotation will occur on December 23, 2025 (UTC +8), and the weekly reward progress for Nocturnal Echoes will not reset after the update. Please plan your challenges accordingly if you wish to obtain \, \ or \.With this update, the \ and \ will also be refreshed.This Period's Recommended Elements:Anemo, HydroThe \ will feature a new rotation. Some ...