ENDFIELD 1.2.5 PATCH & BANNER GUIDE

The new sub-region drops at server reset and within twenty minutes my Wuling factory is bleeding power, my sewage pipes are running 1.2 kilometers across three biomes, and I’m staring at a Xircon Effluent ratio so brutal it makes the original V4 economy look generous. Patch 1.2.5 isn’t a victory lap before 1.3. It’s a stress test disguised as a content drop, and most of the build guides floating around right now are already obsolete.

TL;DR - Key Points

• Test Area sub-region opens in Wuling — fog-shrouded zone east of Aurelyne, gated behind a Liquid Heavy Xiranite barrier, roughly an hour of story content
• Ore caps raised to 540 originium and 240 cuprium — gated behind Wuling Regional Development Level 15, with high-purity nodes doubled to 1 unit per 3 seconds
• Marker Stone Outpost reaches level 3 — bill generation rate scales with it, so existing factories must expand throughput or back up against the new ceiling
• Purification Node added — converts sewage to Xircon Effluent at a punishing 30:1 ratio, and the Test Area’s Water Treatment Sector is a trap right now
• Gilberta and Laevatain rerun on a joint banner — no rate-up guarantee carryover, 120-pull spark still applies, weapon pity does not transfer from the original banners
• Four new Forge slots and one extra Depot tier — these are the unsung MVPs for HC Valley battery factories under the new bill load
• Patch 1.3 projected for early June 2026 — most likely the week after the Feast banner concludes, with Mi Fu and a new melee unit headlining

Related read: Patch 1.2.5 Test Area: Factory & Pull Analysis goes deeper on patch 1.2.5.

What Arknights Endfield patch 1.2.5 actually changed under the hood

The headline addition is the Test Area, a fog-shrouded zone roughly three Origometry units east of Aurelyne that opens after a short story beat and a Liquid Heavy Xiranite gate. The main story content there runs about an hour, but the factory implications stretch well beyond that.

Marker Stone Outpost now goes to level 3, mirroring what the second Outpost got in the prior half of the patch. The Jingyu Valley stock redistribution terminal also gains a level cap bump. That’s why you suddenly have four extra Forges sitting in your build queue and no obvious use case: the bill generation rate quietly scaled up to match, and your throughput has to keep pace or your stock bills back up against the new ceiling.

The numbers that actually matter

After about 14 hours in the new zone across two characters, here’s what I’ve confirmed:

• Originium cap raised to 540, Cuprium cap raised to 240, both gated behind Wuling Regional Development Level 15.
• High-purity ore nodes mine at 1 unit per 3 seconds; low-purity nodes mine at 1 per 6 seconds, a flat doubling that makes the RDM grind worth front-loading.
• The new Purification Node converts sewage to Xircon Effluent at a punishing 30:1 ratio, which I’ll get to in detail below.
• Two new mining spots opened: one originium, one cuprium, both inside the Test Area’s exploitable radius.
• One new Depot Node tier (+1 delivery slot), which is the unsung MVP of this patch for anyone running long supply chains.

See also: Purification Node: Sewage to Xircon Analysis for more on wuling.

Why the Test Area’s water treatment sector is a trap right now

This is the part nobody warned me about. The Test Area ships with a dedicated Water Treatment Sector, complete with acid pools and Inert Xircon Effluent deposits sitting right there like they’re begging to be processed. They’re not. The acid pools currently have zero interaction, and the Purification Node only converts sewage, not Inert Effluent.

You can already turn Inert Xircon Effluent into regular Xircon Effluent using the Purifier building added earlier in 1.2, which means the entire water treatment loop in the Test Area is technically optional. You could theoretically run a factory in Wuling with zero water treatment units now, which is genuinely impressive engineering on the dev side but creates a paradox: the most visually distinctive new mechanic in the patch is a dead end for at least another two weeks.

The sewage logistics nightmare

To feed the Purification Node, you have to pipe sewage from either Jingyu Valley or the central AIC hub across roughly 1 kilometer of conduit inlets. Then you pipe the resulting Xircon Effluent back out the same distance. Conduit inlets and outlets transfer 4 units per second (two pipes’ worth), so you’re looking at significant placement cap consumption for a byproduct stream that produces about 1 effluent every 5 seconds at full feed.

The math is brutal: ores are the bottleneck, not Xiranite, so increasing Xiranite efficiency by tunneling extra sewage halfway across the map saves you nothing meaningful. I’d skip the Water Treatment Sector entirely until the next sub-AIC area opens, which based on the V4 layout is almost certainly the final Wuling sub-region in patch 1.3.

How to actually use the four new Forges without bricking your base

The new Forges aren’t there for new recipes, they’re there for throughput parity. With Cuprium parts now bottlenecking Hetonite production at full efficiency, and the increased bill generation rate from the upgraded Outposts, your existing factory will choke if you don’t expand horizontally.

My setup that survived the transition: dedicate two Forges to Cuprium parts, one to Hetonite components, and one as a flex slot for whatever your next-tier battery requires. If you’re running an HC Valley battery factory like most of us are, that flex slot becomes critical because HC batteries are power-hungry, and the chain reaction failure mode is ugly. For the full background on this setup, see our Wuling factory optimization breakdown for HC Valley batteries.

The thermal bank failure cascade

I watched this happen to a buddy of mine running mostly the same blueprints. The issue is simple but catastrophic: if you feed thermal banks directly from the packaging unit output, any hiccup in production drains your batteries to zero in roughly 8 to 12 minutes, depending on draw. There’s no buffer.

The fix is structural. Route your packaging unit through four outputs, not two. One output feeds a single thermal bank, the rest feed depots. That way each thermal bank has a dedicated supply line, and your depot acts as the buffer that lets the factory restart itself if something upstream stalls. Two outputs will jank out under load because the distribution logic isn’t smart enough to balance properly when one consumer is dry and another is full.

Should you pull on the Gilberta and Laevatain rerun banner?

This is the first character rerun Endfield has done, and the format is a clear shot across the bow: it’s a 1-in-4 special banner, not a traditional 50/50 with rate-up. Weapon pity does not carry over from previous banners, even though the weapons offered are functionally identical, because the banners are technically worded as new instances.

The 120-pull guarantee still applies, so worst case you spend 60,000 of the premium currency to lock in your pick — see our pity system breakdown for how the carryover rules interact across banners. But the absence of a rate-up means if you only want Gilberta, you’re statistically getting Laevatain or one of the standard 5-stars about three out of four times until that guarantee kicks in.

My honest take on each character

Gilberta is the strongest arts-support unit currently in the game. On a Rossi team running Endmin, Chen Qianyu, and Perlica, she replaces the weakest link and dramatically smooths the rotation, especially during her ult window where Rossi can nuke through the damage amp. She’s also flexible across most arts comps that aren’t pure nature damage.

Laevatain is a hard carry main DPS with a heat-team identity. Her signature weapon, Umbral Torch from the battle pass, and White Night Nova form a clean tier list. Rossi’s signature weapon doesn’t synergize with her despite both being crit-adjacent because Laev’s kit doesn’t actually stack crit aggressively. If you main Laev, prioritize her sig. If you flex between teams, Gilberta’s sig has wider utility.

For a Heat team with Laevatain as the main DPS, Ardelia is honestly more useful than Gilberta because she forces corruption application on enemies, which gates several of Laev’s damage multipliers. Gilberta shines in non-Heat arts comps. For a deeper comparison of every 6-star and their weapon priorities, see our character potential and weapon priority breakdown.

Is Zhuang Fangyi worth the pull with her banner overlapping?

Yes, and here’s why the overlap matters. This is the first time Endfield has run two banners concurrently, with Fangyi’s standard banner continuing for another week while the Gil/Laev rerun launches today. If you have her Dossier from the Fangyi banner sitting in your stash, it doesn’t apply to the rerun banner, only to the next Chartered banner introducing a new featured unit.

After roughly 60 hours testing Fangyi rotations, her optimal core is locked: Fangyi, Perlica, and Arclight. The fourth slot is genuinely flexible. Antal remains the safe pick for additional electric damage scaling, but Gilberta slots in beautifully if you’ve got her. Avywenna works as a dual-striker option, and Ember is sneaky-strong because Fangyi prefers uninterrupted skill spam.

The basic Fangyi rotation that actually works

Forget the complicated guides. Start with Perlica basic skill, fast attack, then a rapid-trigger combo of Fangyi combo skill into Perlica combo skill. Wait a beat, optionally throw another Perlica basic skill for the electrification re-application, then Fangyi basic skill to consume the electrification stacks and charge her ult.

With Arclight in the slot, you weave her combo skill in after the rapid trigger to extend the electrification window. Arclight functions as an ult battery rather than an SP battery because her combo skill comes off cooldown fast enough to spam. Don’t rush consumption of electrification stacks. Patience here adds roughly 15 to 20 percent more damage per rotation. The complete Zhuang Fangyi rotation and team-building guide covers the burst windows and slot-by-slot decision priority in much more detail.

What the new mining nodes mean for your long-term factory plan

The 540 originium and 240 cuprium ceilings sound generous until you realize the Hetonite production chain at full efficiency burns through cuprium parts at a rate that makes Yazhen Syringe A production almost mandatory just to keep sewage flowing. Cuprium also caps trade goods at the level 3 Cardiac, where Hetonite parts are now part of the rotation.

Here’s the actual sequence I’d recommend for anyone rebuilding around 1.2.5:

• Push Wuling Regional Development to level 15 first to unlock the high-purity conversion on existing nodes. Doubling mining speed retroactively is worth more than any new node.
• Set up cuprium-to-sewage conversion via Yazhen Syringe A as a parallel line. This prevents cuprium cap-out and keeps your sewage stream running for the new battery recipes.
• Donate excess cuprium to either Wuling area if you’re maxing the cap. The regional development gains compound.
• Treat the Test Area as a future investment, not a current factory site. Bottle your Xircon Effluent and pipe it home for now.

The new event content and event timing breakdown

Patch 1.2.5 includes an exploration event in the Test Area and a cooking event, both running parallel to the existing Fangyi banner. The Palm-Top Savior event has wound down, and if you missed making materials, the shop is still accessible but the production phase is closed. There’s no recovery mechanism, so this is a hard miss if you stepped away.

The exploration event chains into the new map’s chest hunt, which is genuinely the best part of the patch from a non-factory standpoint. Endfield’s landscape design hits painterly highs in the Test Area, with fog-cloaked acid pools and a Delta Bot that’s gated behind a sewage drain puzzle (the NPC opens the door for you once the relevant cistern is empty). Total exploration time clocks in around 90 to 120 minutes for the core area.

Patch 1.3 release window

Based on banner pacing and the standard 20-day cycle, patch 1.3 lands in early June 2026, most likely the week after the Feast banner concludes. The probable banner lineup is Mi Fu and a new edge-archetype melee unit in 1.3, followed by an arcane caster and a Feranmut Proxy unit in 1.4. The Contingency Contract-style endgame event referenced in the launcher data also points to a Joint Operations banner in roughly that window, which historically packed 4 strong units into a single instance.

Why patch 1.2.5 is the most underrated update Endfield has shipped

Most of the surface-level additions look minor: one sub-region, four forges, two mining nodes, a rerun banner. But the structural changes underneath — the bill generation increase, the cuprium-driven sewage loop, the throughput-balanced Forge expansion, and the Purification Node’s hint at future water-cycle complexity — point to a development team that’s playing a long game with the factory economy.

The Test Area’s deliberately under-baked Water Treatment Sector is the tell. They’re not adding mechanics for the current patch; they’re seeding infrastructure for 1.3 and 1.4. That’s confident development. Compare it to gachas that frontload every system at launch and have nothing to add by month six, and Endfield’s pacing looks genuinely smart.

The downside is that this patch punishes casual engagement harder than any update so far. If you skipped a week, your factory is probably broken. If you didn’t push Regional Development, you can’t access the new ore caps. If you blew your pulls on Fangyi’s weapon without realizing the Laevatain weapon banner had a hard expiration, you’re locked out. Arknights Endfield patch 1.2.5 has officially become a game that rewards weekly discipline.

FAQ

Is Gilberta worth pulling for if I already have Rossi and Laevatain?

Yes, if your Rossi team is your main carry comp. Gilberta replaces weaker arts supports in the rotation and her ult window pairs perfectly with Rossi’s crit burst. For a Heat team built around Laevatain, skip Gilberta and prioritize Ardelia instead since corruption application matters more than Gilberta’s amp for that specific kit. Her signature weapon is strong but not mandatory.

How do I get sewage to the Test Area for the Purification Node?

You have to pipe it manually using conduit inlets and outlets from either Jingyu Valley or the central AIC hub, a roughly 1-kilometer run. Each manifold transfers 4 units per second, equivalent to two pipes. Honestly, I’d recommend skipping this entirely for now since the 30-to-1 sewage-to-effluent ratio makes the infrastructure investment not worth it until a closer sub-region opens.

Does weapon pity carry over from the original Gilberta and Laevatain banners?

No, weapon pity does not carry over. The rerun banners are technically classified as new banner instances even though they offer the same weapons. You start fresh from zero pulls. This applies to all weapon banners across Endfield based on current implementation, so plan your pulls assuming no carryover from any expired weapon banner regardless of the character.

When does Arknights Endfield patch 1.3 release?

Patch 1.3 is expected in early June 2026, most likely the week following the conclusion of the current Feast banner. The probable featured units are Mi Fu and a new melee character, with a Joint Operations-style banner potentially tied to a Contingency Contract endgame event. Exact dates haven’t been announced but the 20-day banner cycle and current event timers point firmly to that window.

What’s the best Fangyi team without Gilberta?

Fangyi, Perlica, Arclight, and Antal remains the strongest accessible comp. Antal provides electric damage scaling and works as a secondary vanguard. If you don’t have Antal, Avywenna creates a dual-striker variant that does competitive single-target damage. Ember is a sleeper pick because Fangyi benefits from uninterrupted skill rotations, and Ember’s kit doesn’t fight her for screen time the way some supports do.

Can all Endfield content be cleared without artificing characters?

Yes, every current piece of content is clearable without artificing. Artificing costs stock bills rather than sanity, so it’s a long-term investment for your favorite characters rather than a meta requirement. The main use of Wuling stock bills outside artificing is engraving tickets, so if you’re not artificing, dump bills into engraving instead. Save artificing for characters you actively play in your endgame teams.