Arknights: Endfield Sanctuary of Ink Update Guide

Arknights: Endfield Sanctuary of Ink Update Guide

The Sanctuary of Ink update for Arknights: Endfield goes live after maintenance on October 15, 2026, introducing a substantial wave of new content. This version marks the game’s Steam launch and includes two new 6★ operators, fresh story chapters, exploration zones, and multiple limited-time events. Players should note the mandatory client re-download and compensation details to prepare for the update.

At a Glance

• Maintenance: Asia Server: 2026-10-15 06:00–12:00 (UTC+8); Americas/Europe: 2026-10-14 17:00–23:00 (UTC-5)
• Compensation: 1800 Oroberyl (900 for update, 900 for bug fixes) sent in two separate mails after the Mail feature unlocks
• New 6★ Operators: Si, Argent Flow
• New 6★ Weapons: Jade Vessel (Greatsword), Lunar Calling (Sword), Long Heritage (Greatsword), Complexed Industry (Sword)
• New Area: Wuling – Si's Painting
• Key Events: Yuanyuan's Blazing Stoves, Spirit's Restoration Sign-In, Arena of Games Challenge, Contingency Contract: Indigo Experimental Operation

New Operators and Weapons

The update introduces two 6★ operators: Si and Argent Flow, each featured in their own Chartered Headhunting banners. Si is available in the Rejuvenation banner from update through November 5, 2026, while Argent Flow headlines The Hearth Fire Beckons the Starry Flow banner starting November 5, 2026.

Four new 6★ weapons arrive alongside them: Jade Vessel (Greatsword), Lunar Calling (Sword), Long Heritage (Greatsword), and Complexed Industry (Sword). These are tied to corresponding Arsenal Issue events, with Jade Vessel and Lunar Calling receiving RateUp in the Seal of Jade and Moongleam Issue arsenals, respectively.

New Areas and Story Content

Players can explore the new Wuling – Si's Painting area, which serves as the backdrop for several new missions. Main story progress extends to Chapter II Process VIII: Paint with Fresh Ink. Exploration missions include Miscellanies on Rampage, Post Destination, A Painting Open for Business, and Farming Automation. Seven new side missions are available, such as Back to the Rustics, Unrequited Love, and the Yuanyuan Innkeeper trilogy.

Events and Rewards

Multiple events launch with the version, offering significant Oroberyl and other rewards:

• Yuanyuan's Blazing Stoves (Fun & Games): Manage Yuanyuan Manor Inn in Si's Painting to earn up to 1000 Oroberyl and Mark of Perseverance. Available post-update through the next maintenance.
• Spirit's Restoration Sign-In: Sign in for 7 days to earn Spirit's Restoration HH Permit ×5. Runs from update through November 5, 2026.
• All the Inky Hues Guide: Complete missions in Si's Painting for 1200 Oroberyl and Mark of Perseverance. Available post-update through November 5, 2026.
• Carly's Verdant Anthology Camera: Complete camera missions for 1500 Oroberyl, Portrait Frame, and Mark of Perseverance. Runs October 22–November 5, 2026.
• Arena of Games Challenge: Earn Arena Points for tier-based rewards including 1200 Oroberyl. Available October 29–November 19, 2026, with content update on November 11.
• Contingency Contract: Indigo Experimental Operation: Select Test Criteria to earn rewards like Vitrified Indigo, exchangeable at the Secret Sanctuary for 2000 Oroberyl and more. Available November 5, 2026, through maintenance.
• New Era for the Myriad Souls: Story shoot event for 300 Oroberyl and T-Creds. Runs October 31–November 14, 2026.
• Argent Flow Narrative Event: Complete Back to the Rustics side mission for 600 Oroberyl and Elementary Cognitive Carrier. Available November 5, 2026, through maintenance.
• The Stars Are With Me Sign-In: 7-day sign-in for The Stars Are With Me HH Permit ×5. Available November 5, 2026, through maintenance.
• Sanity Supply Limited-Time Event: Daily missions for Sanity Usage Permit and Emergency Sanity Booster. Asia: November 19–26, 2026; Americas/Europe: November 19–25, 2026.

Gameplay and System Updates

Beyond content, the update refines core systems:

• Combat: Added combo skill priority adjustment on the Team screen. New Team06 and Team07 slots allow more saved teams. Liino’s vibration feedback improved when not the controlled operator.
• Gear Plan: New feature to save and name multiple gear setups for quick switching.
• LTO Sanity Meds Auto-Use: Expired limited-time Sanity Meds auto-convert to Sanity, with overflow to Sanity Essences via Extractors.
• Cabin Shift Rotation: Cabins now support two operator shifts (A/B) with manual or auto-rotation.
• AIC Factory: Wuling region development cap increased. New Auto-Farmer facility unlocks for automated germinate and harvest in Si's Painting and later Wuling City.
• Umbral Monument: Murmurs of the Deep Forest stages (4 total) available from October 22, 2026, with Monumental Etching: Forest of Maras event offering 1200 Oroberyl and Advanced Progression Selection Crate II.
• Delver of the Cryptic: Fade Beyond the Painting spatial set rolls out in phases—3 Protocol Spaces initially, 3 more on November 19, 2026, for up to 1200 Oroberyl rewards.
• Protocol Pass: Ink Scroll: Active during the Sanctuary of Ink period, offering Basic Supply tier by default, with level-up rewards including Basic HH Permit, Oroberyls, Exchange Crate-o-Surprise, and Progression Materials. Advanced Progression Selection Crate I replaced by Crate II; Warp Plasma-Coated Slide added as a selectable material.

Should You Pull?

For Si: Strong early pick for players building a physical DPS lineup. Her kit offers consistent damage and survivability, making her viable in early-to-mid game content. The Rejuvenation banner includes solid off-rate options like Typhoeus and Lifeng, reducing risk for F2P players.

For Argent Flow: Best suited for players investing in sword-based or hybrid teams. Her trial via Combat Drills during her banner allows testing before committing pulls. The Hearth Fire Beckons the Starry Flow banner shares the same rate-up pool as Si’s, so pulling for one may yield the other.

Weapon banners (Seal of Jade for Jade Vessel, Moongleam for Lunar Calling) are worth considering if you lack strong greatsword or sword options. The Rate-Up weapons are solid generalist picks, but off-rate weapons like Former Finery or Sundered Prince offer niche utility.

F2P players should prioritize completing event tasks for free Oroberyl (e.g., 1000 from Yuanyuan's Blazing Stoves, 1200 from All the Inky Hues) to fund pulls without spending. The 1800 Oroberyl compensation also provides a solid starting point.

Conclusion

Sanctuary of Ink delivers meaningful expansion for Arknights: Endfield, balancing new narrative exploration with tangible gameplay improvements. The dual-operator launch, extensive event calendar, and quality-of-life updates like Gear Plan and Auto-Farmer address both progression and convenience. With compensation in hand and multiple free reward paths, players of all investment levels can engage with the new content immediately.