Arknights: Endfield

Arknights: Endfield officially launched its Sanctuary of Ink update on October 15, 2026, bringing a substantial collection of new content to the action RPG. Developed by Mountain Contour and published globally by GRYPHLINE, the update expands the game's story, introduces two six-star operators, and opens a new exploration area inspired by traditional ink paintings. It also coincides with the game's official release on Steam, allowing PC players to access the adventure through another major distribution platform.

With new operators, expanded exploration, and additional progression opportunities, Sanctuary of Ink gives players plenty of reasons to revisit the world of Talos-II. Z2U also provides a marketplace to Buy Arknights: Endfield Account, where users can compare available accounts and review seller listings based on their preferences.

Arknights: Endfield Sanctuary of Ink Update Overview

The Sanctuary of Ink update introduces several major additions across story content, character progression, exploration, and platform availability.

New Story Chapter Introduces Si's Painting

One of the update's central attractions is Wuling - Si's Painting, a new area that expands the game's exploration experience through an unusual illustrated environment.

The story follows Si as she brings an injured Endministrator to Yuanyuan Manor Inn to recover. As strange events unfold in the surrounding mountains, the characters become involved in a journey connected to Si's painting abilities and events dating back ten years.

Unlike a conventional landscape, the new area incorporates the concept of a painting into its exploration mechanics. Players can encounter unusual creatures formed from objects within the illustrated world and use special abilities to navigate its terrain.

The Miracle Brush is a particularly notable feature. It can create bridges between cliffs, changing the surrounding environment and opening routes that would otherwise be inaccessible. This gives players a new way to interact with the world instead of relying exclusively on traditional traversal.

The update also adds several story and exploration missions, including:

• Main story: Chapter II Process VIII: Paint with Fresh Ink.

• Exploration missions: Miscellanies on Rampage, Post Destination, A Painting Open for Business, and Farming Automation.

• Side missions: Back to the Rustics, Unrequited Love, The Story Continues, A Day to Remember, and three Yuanyuan Innkeeper missions.

Some content unlocks progressively as players advance through the game, so not every mission is necessarily available immediately upon entering the new area.

Si and Argent Flow Join the Operator Roster

Sanctuary of Ink introduces two six-star operators with distinct combat identities. Their different approaches to battle provide additional options for players developing their teams.

Si: A New Operator Built Around Inksoul

Si is closely connected to the new story area and Yuanyuan Manor Inn. Her combat mechanics revolve around Inksoul, allowing her to establish a connection with an enemy and redirect damage and effects applied to the Inksoul back to the original target.

Her documented combat features include:

• Inksoul interactions: Apply damage and effects through the connection to an enemy.

• Combat interruption: Use the mechanic to interrupt certain enemy charging attacks.

• Team support: Strengthen teammates associated with Cryo and Heat damage.

• Tactical flexibility: Continue applying pressure through Inksoul interactions even when the original enemy moves beyond the immediate attack range.

These mechanics make Si an interesting addition for players who enjoy coordinating abilities rather than relying exclusively on direct attacks.

Argent Flow: Mounted Combat and Powerful Finishing Attacks

Argent Flow takes a different approach, combining swordsmanship, spear techniques, and mounted combat with his horse, Nuli.

His signature combat presentation emphasizes charging attacks, aerial movement, and powerful finishing strikes. His background also connects him to the Endministrator, adding another character relationship to the update's wider narrative.

Together, Si and Argent Flow provide two contrasting operator concepts: one focused on unusual combat interactions and team support, and the other built around mounted attacks and aggressive physical combat.

Yuanyuan's Blazing Stoves Adds Farming and Inn Management

Another major addition is Yuanyuan's Blazing Stoves, a limited-time event centered on managing Yuanyuan Manor Inn.

The activity introduces a different pace from the game's combat-focused missions. Players can grow crops, raise animals, prepare dishes, welcome guests, and use the proceeds to expand the farm and inn.

The main gameplay elements include:

• Farming: Grow crops that support the inn's production activities.

• Animal husbandry: Raise animals to obtain resources.

• Cooking: Turn agricultural products into dishes for guests.

• Inn management: Earn income through hospitality and improve the property.

• Expansion: Develop the farm and inn as the management activity progresses.

The update also improves farming convenience. Players gain access to the Auto-Farmer feature as they progress through the relevant story content, allowing aspects of planting and harvesting to be automated. This complements the broader industrial development systems already present in Arknights: Endfield.

The event begins after the Sanctuary of Ink update, with its content scheduled to be updated on October 22. Players can earn rewards by completing event tasks and increasing their inn milestones, including up to 1,000 Oroberyl and Marks of Perseverance among the listed rewards.

Importantly, the end of the limited-time event does not remove the entire inn-management activity. Players can continue managing Yuanyuan Manor Inn and claim its milestone-phase rewards, although expired event tasks and their associated limited-time rewards will no longer be available.

New Weapons, Enemies, and Challenge Content

The update also expands the equipment and combat content available to players.

Four six-star weapons are listed in the official update notes:

• Jade Vessel, a greatsword.

• Lunar Calling, a sword.

• Long Heritage, a greatsword.

• Complexed Industry, a sword.

Jade Vessel receives increased availability through the Seal of Jade Issue weapon banner, while Lunar Calling is featured in the Moongleam Issue banner scheduled to open on November 5.

New enemies include Fortune's Stash, Scroll of Tactics, Simmer's Purge, and Maned Measure. The update also introduces further permanent challenge content through Echoes of War, with the Season of Phantasia adding three new stages.

Additional activities are scheduled to arrive during the version period. These include the Contingency Contract: Indigo Experimental Operation challenge event and the Fade Beyond the Painting spatial set for Delver of the Cryptic. Their staggered release gives players more objectives to pursue after completing the initial story content.

Arknights: Endfield Officially Launches on Steam

The Steam release is another important part of the October update.

Arknights: Endfield officially became available on Steam alongside the Sanctuary of Ink launch. According to the publisher, cross-platform account synchronization is supported, allowing existing players to continue their adventures using their current accounts.

The published PC requirements include:

Players should check the official Steam store page for the latest compatibility and installation information.

The update also includes several quality-of-life improvements. Facility placement is more flexible because facilities can be placed using items or materials stored in depots. Farming areas gain a top-view mode, planting plots can be positioned more closely together, and fertilization options allow operators to assist with agricultural tasks. Controller support and certain interface interactions have also been improved.

Conclusion

Arknights: Endfield's Sanctuary of Ink update combines story expansion, new operators, farming activities, additional equipment, and technical improvements in one major release. The introduction of Si's Painting gives exploration a distinctive visual identity, while Si and Argent Flow expand the roster with different combat styles. Yuanyuan's Blazing Stoves adds a management-focused activity, and the Steam launch makes the game accessible through another PC platform.

With additional challenges and events scheduled throughout the version period, Sanctuary of Ink offers more than a single story chapter. It provides a broader collection of activities for players to explore while maintaining the game's central combination of combat, exploration, and industrial development.

For returning players, the new story and operators are the main attractions. Those who prefer progression systems beyond combat can also look forward to the farming and inn-management features introduced in this update.

As Sanctuary of Ink expands the game's world with fresh challenges and new characters, account progression remains an important consideration for many players. Z2U makes it easier to explore a Cheap Arknights: Endfield Accounts through different seller offers, allowing buyers to compare prices and account details before deciding which option suits their needs.