Sketches of Lost Heirlooms
Maintenance Update & Bug Fix Compensation Details
2026-06-05
Maintenance Compensation
Update & Maintenance Compensation
Oroberyl ×900
Bug Fix Compensation
Oroberyl ×900
Distribution Period: After the update and maintenance - Before the next version update and maintenance
Eligibility: Create a character before the update
Note: Update & Maintenance Compensation and Bug Fix Compensation will be sent separately via in-game mail. The mails will expire at the start of the next version update and maintenance, so please claim them in time.
Maintenance Time
Asia Server: 2026/06/05 06:00 - 2026/06/05 12:00 (UTC+8)
Americas / Europe Server: 2026/06/04 17:00 - 2026/06/04 23:00 (UTC-5)
*The server reopening time after maintenance may be earlier or later than scheduled. Please check the official announcement for details.
New Version Content
New Stories
Exploration Missions
- OD Project: Sky King Flats III
- Cliffside Riddles of Steel
- Trial of Swordmancy
Side Missions
- Deep Vaulted Steel
- A Fistful of Reflections
- Danse Macabre
New Operators
6★ Mi Fu — Rate-UP in Fists of No Regrets Chartered Headhunting
6★ Camille — Rate-UP in Expunger of Sin Chartered Headhunting
New Weapons
6★ Amaranthine Tassel (Greatsword) — Rate-UP in Scarlet Knot Issue
6★ Phantom Pain (Greatsword)
6★ Blessing of Lustrous Carmine (Polearm) — Rate-UP in Crimson Hued Issue
6★ Beacon of Duty (Polearm)
New Enemies
New Area
Wuling - Sword Vault Dale
New Headhunting Events and Issues
Fists of No Regrets Chartered Headhunting
Limited Banner
Availability: After version release - 2026/06/26 11:59 (server time)
Features the Rate-UP 6★ operator Mi Fu.
6★ Operators: Mi Fu / Zhuang Fangyi / Rossi / Ember / Lifeng / Ardelia / Last Rite / Pogranichnik
Combat Drills available for trying out Mi Fu with preset teams. One with Her Fists HH Permit added to AIC Quota Exchange.
Scarlet Knot Issue
Weapon Banner
Opens: After version update
Ends: After 3 Chartered Headhunting banners
Features the Rate-UP 6★ weapon Amaranthine Tassel (Greatsword).
6★ Weapons: Amaranthine Tassel (Greatsword) / Former Finery (Greatsword) / Sundered Prince (Greatsword) / Clannibal (Handcannon) / Rapid Ascent (Sword) / Detonation Unit (Arts Unit) / Valiant (Polearm)
Expunger of Sin Chartered Headhunting
Limited Banner
Availability: 2026/06/26 12:00 (server time) - Before next version update
Features the Rate-UP 6★ operator Camille.
6★ Operators: Camille / Mi Fu / Zhuang Fangyi / Ember / Lifeng / Ardelia / Last Rite / Pogranichnik
Peacekeeper's Nocturne HH Permit added to AIC Quota Exchange.
Crimson Hued Issue
Weapon Banner
Opens: 2026/06/26 12:00 (server time)
Ends: After 3 Chartered Headhunting banners
Features the Rate-UP 6★ weapon Blessing of Lustrous Carmine (Polearm).
6★ Weapons: Blessing of Lustrous Carmine (Polearm) / Valiant (Polearm) / JET (Polearm) / Clannibal (Handcannon) / Thermite Cutter (Sword) / Oblivion (Arts Unit) / Exemplar (Greatsword)
New Events
Search for Sword Vault Dale Guide Event
Guide Event
Event Time: After version release - 2026/06/26 12:00 (server time)
Complete specified missions in the Sword Vault Dale region to receive event rewards including Oroberyls and Mark of Perseverance.
One with Her Fists Sign-In Event
Sign-In Event
Event Time: After version release - 2026/06/26 11:59 (server time)
Sign in for a total of 7 days to earn rewards such as One with Her Fists HH Permit ×5.
A Fistful of Reflections Narrative Event
Side Mission Event
Event Time: After version release - Before next version update
Follow Mi Fu through a chain of reflections on what it means to clench a fist and what it means to let go. Complete the side mission to earn Oroberyls, Elementary Cognitive Carrier, Protohedron, and Arms INSP Set.
Contingency Readiness Limited-Time Event
Limited-Time Event
Event Time: 2026/06/12 04:00 - 2026/06/19 04:00 (server time)
Complete daily readiness tasks to earn Sanity Usage Permit, Emergency Sanity Booster, Wuling Artificing Catalyst, and Coolant Gel.
Contingency Contract: Re-Ignition Experimental Operation
Challenge Event
Event Time: 2026/06/19 12:00 (server time) - Before next version update
Update: 2026/06/26 12:00 (server time)
Secret Sanctuary: 2026/06/19 12:00 - 2026/07/23 04:00 (server time)
Take on tiered operational risks to claim rewards including Portrait: Ancient Contract, Portrait Frame: Contingent Inscription, Vitrified Coins, Sticker: Contingency Contract, Oroberyls, and Advanced Progression Selection Crate I.
Peacekeeper's Nocturne Sign-In Event
Sign-In Event
Event Time: 2026/06/26 12:00 (server time) - Before next version update
Sign in for a total of 7 days to earn rewards such as Peacekeeper's Nocturne HH Permit ×5.
Danse Macabre Narrative Event
Side Mission Event
Event Time: 2026/06/26 12:00 (server time) - Before next version update
Investigate alongside Camille as a peacekeeper's final ledger comes due. Complete the side mission to earn Oroberyls, Elementary Cognitive Carrier, Protohedron, and Arms INSP Set.
Carly's Fairytale of Wuling Camera Event
Camera Event
Event Time: 2026/07/02 12:00 (server time) - Before next version update
Complete camera missions to earn Portrait Frame: Carly's Ink Painting Book, Oroberyls, and Mark of Perseverance.
Sanity Supply Limited-Time Event
Limited-Time Event
Event Time:
- Asia: 2026/07/09 04:00 - 2026/07/16 04:00 (server time)
- Americas/Europe: 2026/07/09 04:00 - 2026/07/15 17:00 (server time)
Complete specified missions every day to receive Sanity Usage Permit and Emergency Sanity Booster.
Event & Gameplay Updates
Trial of Swordmancy Permanent Mode
Availability: 2026/06/12 12:00 (server time)
The new permanent mode includes Rewarded Trial Mode and Free Trial Mode. Clear stages to earn Wuling Stock Bills.
Trial Algorithmics: Limited-time challenge running 2026/06/12 12:00 - Before next version update. Clear challenges to earn Oroberyls, Mark of Perseverance, Advanced Progression Selection Crate I, and Advanced Cognitive Carrier.
Umbral Monument Challenge Updated
Availability: 2026/07/02 12:00 (server time)
Contention of Deathly Silences Stages: 6 new stages available. Complete all stage challenges to earn Mark of Perseverance, Advanced Cognitive Carrier, Arms INSP Set, and Protohedron.
Monumental Etching: Dirge of Grief: Limited-time challenge running 2026/07/02 12:00 - Before next version update. Complete various Umbral Monument challenges to claim the event reward.
Crisis Fragment Permanent Mode
A new permanent gameplay mode is now available. Complete the side mission Deep Vaulted Steel to unlock the combat stage Crisis Fragment: Craghowler.
Acquisition Center Update
Protocol Pass: Viridian Mont is available. During this version period, acquire various support items from Arsenal Engineers. Activating each seasonal Protocol Pass unlocks the Basic Supply tier by default. Level up to earn Basic HH Permit, Oroberyls, Exchange Crate-o-Surprise, and Progression Materials.
Added in Acquisition Center: Bundles: Pugilistic HH Bundle, Expurgatory HH Bundle. Purchase limits for Protocol Flow Bundle and Value Arsenal Ticket Pack are reset.
AIC Factory Updates
New Features
Backup Power: If a region runs out of power while you're playing, its backup power will automatically activate to temporarily supply unlimited electricity to all facilities, maximizing AIC uptime.
Regional Overview: Added to the Regional Development screen. Provides an overview of current information in the Regional Development System, including Stock Redistribution and Depot Node, and lets you quickly view their locations on the map.
Multi-Clog Auto-Fix: When the Expanded Crucible is running multiple production formulas and all of them are clogged, the Expanded Crucible will automatically remove all items from the cache so reactions can proceed normally.
Quick AIC Report: Added quick access to the AIC Report from the main screen.
Regional Development Updates
- Wuling region Regional Development Level cap increased.
- Sky King Flats Construction Site outpost level cap increased with new tradable goods.
New System Features
- Gear Artificing Auto-Fill: When artificing gear, you can bulk-select multiple pieces at once.
- Essence Wishlist: New feature that unlocks at Exploration Level 4. Set wished-for essence stats and surface matching results faster.
- Weapon Batch Dismantling and Lock Management: Dismantle and lock multiple weapons at once.
Optimizations
Combat System
- Optimized the indicator when switching locked targets.
- Optimized warnings for attacks from off-screen enemies and added visual warning effects for these attacks.
AIC Factory
- Optimized Wuling power connection. The Xiranite Pylons and Xiranite Relays within the Core AIC Area can now be connected to outer Xiranite facilities.
- Optimized the grid display effect when placing facilities in transition zones between steep slopes / cliffs and flat ground.
Voice Languages and Sound Effects
- Optimized certain dialect dialogue lines in Wuling - Wuling City.
- Optimized the voice-over performance of certain NPCs.
System
- Seed Extraction: Simplified the seed extraction screen by removing the quantity selection buttons.
- Mission Priority: Optimized display priority. Operator side missions now receive a Recommended tag during related narrative events.
- Daily Tasks: Sanity-spending tasks now award 20 Activity Points instead of 10; enemy-defeat requirements reduced from 20 to 10; two new daily tasks added.
- Weekly Routine: The Weekly Routine tab is deprioritized after all rewards are claimed.
- Engraving Permits: Optimized selection logic for Energy Alluvium.
- Beginner Events: Optimized reward-claiming logic.
- Mobile Notifications: Added system notifications on mobile devices with toggleable settings.
Other Optimizations
- Optimized portrait display in Baker Messages.
- Optimized the crosshair UI during liquid spraying.
- Optimized visual and sound effects in certain scenes.
- Optimized the switching logic between controller and keyboard/mouse controls.
- Optimized button display and ordering for controller gameplay.
Bug Fixes
Missions
- Fixed an issue where the mission tracker displayed abnormally under specific circumstances.
System
- Fixed an issue where custom map markers displayed abnormally under specific circumstances.
- Fixed an issue where the map for Wuling City - Qijian Dais was missing when checking the Wuling Region Overview.
- Fixed an issue where some markers at the edges of the map did not disappear properly after clearing selected markers in Marker Tags.
- Fixed an issue where the map screen displayed abnormally under specific circumstances.
Other Fixes
- Fixed an issue where operators who were disconnected in Active Blight zones under specific circumstances could incorrectly remain within an Active Blight zone upon resuscitation.
- Fixed an issue where parts of the overview screen were abnormally blocked by the scene under specific circumstances.
- Fixed an issue where sound effects of some operators were abnormal under specific circumstances.
- Fixed an issue where the models of some NPCs displayed abnormally under specific circumstances.
- Fixed an issue where certain scenes displayed abnormally under specific circumstances.
- Fixed an issue where NPC Perlica's model could shake abnormally during the main mission Chapter II Process III: Surging From a Withered Spring on some mobile devices.
Source: Official Arknights: Endfield news (Gryphline) — content reproduced for fan reference.
