Arknights: Endfield players now have a fixed date for the next major patch: Version 1.3 “Sketches of Lost Heirlooms” launches June 5, 2026, bringing a new explorable zone, one launch-phase six-star Operator, a later Phase 2 six-star, Endfield’s first Contingency Contract, and factory-system upgrades.
The update’s headline addition is Sword Vault Dale, a new sub-region tied to Wuling and the wider Arknights lore, according to Notebookcheck. The patch also arrives as the current Version 1.2 banner window closes before June 5, making this a clean handoff for players deciding where to spend pulls and upgrade materials.
Arknights: Endfield 1.3 launches June 5 with Sword Vault Dale expansion
Sword Vault Dale opens in Version 1.3 as an ancient area that resurfaced after Wuling’s efforts to clear the Erosion Tide. That gives the update a more lore-heavy hook than a simple map expansion: Notebookcheck says the zone includes references to Chi Xiao, linking Endfield more directly with the original Arknights.
The update does not just add terrain. It bundles a new sub-region, new Operators, an endgame challenge format, and factory management changes into one patch cycle. For a game built around combat squads and production systems, that combination matters more than a standalone character banner.
Gryphline is using Sword Vault Dale to push three tracks at once:
- Exploration: A new sub-region gives players fresh space to move through and investigate.
- Roster pressure: Mi Fu arrives with the update, while Camille follows in Phase 2.
- System depth: Contingency Contract and factory changes target players already living in the upgrade loop.
Light Zhong, Game Producer of Arknights: Endfield, framed the update as part of a continuing polish push:
“We can’t help but feel proud because continuous polishing and non-stop optimization truly can bring everyone a better gameplay experience. ‘Actions speak louder than words’ is a principle we have never changed,” said Light Zhong. “We hope that every piece of game content we release, and every optimization measure we implement, can speak on our behalf and repay the trust of all our Endministrators.”
That quote tracks with the patch structure. Version 1.3 is not only selling a new destination. It is also trying to remove friction from the daily machinery behind progression.
Mi Fu and Camille join the roster with Physical Guard and Heat Vanguard roles
Mi Fu is the immediate roster addition. She is a six-star Physical Guard, patrol captain of the Wuling Watch, and a high-mobility burst fighter built around chaining basic attacks into Battle Skill sequences.
Her Battle Skill, Qingbo Triplex, has three parts: Cloudtrapper, Trail and Mangle, and World Splitter. Notebookcheck says the sequence can pull nearby enemies in or close distance to far targets, apply Crush, and finish with a heavy frontal strike.
Mi Fu’s kit turns on vulnerability stack management. Once an enemy reaches three stacks, her combo skill triggers automatically, applies physical susceptibility, and resets her back into Trail and Mangle. Her ultimate, Pile of No Mercy, lifts a target and slams it for major physical damage while feeding back into that same chain.
Camille arrives later in Phase 2, not on the first day of the patch cycle. He is a six-star Heat Vanguard, Endfield’s first male six-star Operator, and its first limited Heat Vanguard.
| Operator | Timing | Rarity / Role | Core combat focus | Story hook |
|---|---|---|---|---|
| Mi Fu | June 5 launch phase | 6-star Physical Guard | Mobility, burst chains, vulnerability stacks, Crush | Wuling Watch patrol captain |
| Camille | Phase 2 | 6-star Heat Vanguard | Heat damage, heat infliction, SP recovery, summons | Sarkaz vampire and Blood Hunter from Seš'qa |
Camille’s kit centers on Firefang Vesperwings, a summon that deals heat damage and applies heat infliction, weakness, and heat susceptibility across an area. On kill, the Vesperwings migrate to the nearest remaining enemy, which should keep pressure moving without constant recasting.
His standalone event, Danse Macabre, starts from an anonymous blood sample and moves into a criminal investigation tied to someone who shares his bloodline. That makes Camille both a roster expansion and a lore delivery vehicle for the newly introduced Seš'qa region.
Contingency Contract brings higher-pressure challenges to Endfield 1.3
Contingency Contract makes its Endfield debut in Version 1.3. In the original Arknights, the format became known as a high-difficulty challenge mode built around adjustable constraints, and Gryphline is now bringing that structure into the 3D RPG.
The supplied update details describe it as a high-difficulty endgame format, while related event coverage says players will activate specific “Test Criterion” and “Key Criteria” modifiers. Those modifiers can add positive and negative battlefield constraints, forcing players to tune team composition rather than simply out-stat the encounter.
That is the most important longevity play in Version 1.3. Sword Vault Dale gives players new space. Mi Fu and Camille give them new builds. Contingency Contract gives those builds somewhere harsher to prove themselves.
Analysis: If the rewards and difficulty scaling land cleanly, Contingency Contract could become the update’s repeat-play anchor. The key question is not whether veteran players want a harder mode; the source material already frames it as the endgame test. The question is how well Endfield’s combat, skill rotations, and factory-fed progression support repeated attempts under shifting constraints.
For readers tracking other gaming timing windows, MLXIO also has coverage of Dragon Quest Smash/Grow locking Erdrick gear June 16. PC players following enforcement-heavy game systems can also read Riot Vanguard Turns $6K DMA Cards Into Paperweights.
Factory improvements target Endfield’s base-building and production loop
Version 1.3 also targets the factory layer. Notebookcheck lists bulk equipment forging, bulk weapon dismantling, and lock management as confirmed improvements, with lock management designed to protect pinned gear from accidental removal during bulk operations.
Related update coverage adds Backup Power, automated handling for blockages across multiple recipes, a “Perfect Match” label for essence farming, improved off-screen enemy attack warnings, smoother controller and keyboard/mouse switching across menus, and a revamped Daily Task system. Those are not flashy banner features, but they hit the part of Endfield players touch between fights.
The practical effect is simple: less menu drag, fewer accidental losses, and better control over production. In a game where long-term progression depends on resources, gear, and factory output, that can matter as much as one more combat stage.
The next checks are concrete. Players should watch for official patch notes, maintenance timing, banner sequencing, event reward tables, and the exact factory rules when Sketches of Lost Heirlooms goes live. Mi Fu arrives with the June 5 launch phase; Camille comes later in Phase 2. That timing should shape pull planning, resource saving, and which teams players test first in Contingency Contract.
Key Takeaways
- Version 1.3 gives players a clear date to plan pulls, upgrades, and remaining Version 1.2 spending.
- Sword Vault Dale expands Endfield’s world while strengthening ties to the original Arknights lore.
- The mix of new Operators, Contingency Contract, and factory upgrades targets both story-focused and endgame players.
