Season 27 of Genshin Impact Imaginarium Theater is live from September 1 to October 1, 2026, and this rotation is not a “throw any built unit at it” month. Hydro, Electro, and Dendro are locked in as the only core elements, the Brilliant Blessings lean hard into Bloom, Catalyze, Electro-Charged, and Lunar-Charged, and the later Acts punish you if you burn your best Hydro applicators or healers too early. So, we will get you through every Act with this Genshin Impact Imaginarium Theater September 2026 guide today, including Lunar Mode and the Arcana Challenges, without wasting Fantasia Flowers on the wrong picks.
Remember that Theater rewards scale with how many built characters you actually own. If you are still missing a second Hydro applicator, a dedicated healer, or a Lunar-Charged carry, topping up Genshin Impact through Enjoygm is one of the fastest ways to lock the banner you need this version without paying full official prices. Delivery is UID-based and usually lands in seconds, which matters when the season resets on the first of the month and friend-support slots vanish fast.
Genshin Impact Imaginarium Theater September 2026 Season Overview
Genshin Impact Season 27 runs through Version 7.0. Only Hydro, Electro, and Dendro characters can be added to the Principal Cast, with four Special Guest Stars allowed if you own them. Opening Characters also grant a Fantastical Blessing: once they join your party, Max HP, ATK, and DEF increase by 20%.
| Item | Season 27 details |
| Dates | September 1, 2026 – October 1, 2026 |
| Version | 7.0 |
| Allowed elements | Hydro, Electro, Dendro |
| Opening Characters | Columbina, Xingqiu, Cyno, Kuki Shinobu, Lauma, Kaveh |
| Special Guest Stars | Odette, Sandrone, Nicole, Sucrose |
| Act 3 boss | Jadeplume Terrorshroom (Lv. 90) |
| Act 6 boss | Emperor of Fire and Iron (Lv. 92) |
| Act 8 boss | Battle-Hardened Pipilpan Idol (Lv. 95) |
| Act 10 boss | Radiant Moonfly (Lv. 100) |
| Lunar Arcana I | Shadowy Husks (Standard Bearer, Line Breaker, Defender) |
| Lunar Arcana II | Battle-Hardened Primordial Bathysmal Vishap |
How to Clear Imaginarium Theater in Genshin Impact This Month
A Genshin Impact Imaginarium Theater guide that only lists “best teams” fails because Theater is a resource game first. You start with a small Opening Cast, spend Fantasia Flowers on Companion events, Brilliant Blessings, and Mystery Caches, then lock four characters into each Act. Used characters cannot be reused later in the same run.
Use this order of operations every time you open the lobby:
- Peek the full Act list before you spend a single Flower. Note which fights demand Hydro shield-break, Electro-Charged/Lunar-Charged, and team-wide healing.
- Early Acts: take extra characters, especially unbuilt 4-stars, so your later roster is deep enough for Visionary or Lunar Mode.
- Mid Acts: start stacking one Brilliant Blessing path instead of spreading Flowers across three reaction trees.
- Boss Acts: save premium Hydro for Act 6, your best Electro-Charged or Lunar-Charged core for Act 8, and a real healer for Act 10 plus Arcana I.
Difficulty still follows the usual Theater ladder. Easy wants eight characters at Lv. 60 and Normal wants twelve while Hard wants sixteen at Lv. 70. Visionary climbs toward 22–26. Lunar Mode asks for 28–32 built units and forces two Arcana Challenges before Act 10. If your account cannot field that many Hydro/Electro/Dendro units, drop to Hard or Visionary and bank the monthly Primogems instead of resetting Lunar for no Stella.
Brilliant Blessings: Which Path Wins Season 27
The September 2026 cycle only offers reaction blessings that match Hydro, Electro, and Dendro. You do not need all three trees. One high-level path plus a backup is enough.
| Blessing path | What it actually does | When to take it |
| Electro-Charged / Lunar-Charged | Electrosurge after a trigger; Electro-Charged DMG +250%, Lunar-Charged DMG +70% | Priority path. Required for Act 8 hats and strong on mixed waves |
| Bloom / Lunar-Bloom / Hyperbloom | Extra Dendro Cores; Bloom/Hyperbloom/Burgeon +150%, Lunar-Bloom +45% | Best if your roster is Nilou, Kuki, Raiden, Lauma, or Columbina-heavy |
| Catalyze (Quicken / Aggravate / Spread) | Fires a Vigorous Nexus that explodes for AoE Dendro | Good Act 3 insurance if you have Cyno, Tighnari, Alhaitham, or Nahida |
Save Electro-Charged to Level 4 if Act 8 is your wall. And you can save Bloom if your account is Hyperbloom-shaped and you would rather brute-force most waves. Catalyze is the flex pick when Jadeplume Terrorshroom is eating your early roster alive.
Best Characters for Genshin Impact Imaginarium Theater September 2026
Since the cast is RNG after the Opening six, “best characters” means priority when the game offers them, not a fixed four-slot team.
Hydro Priority
- Must-save for Act 6: Neuvillette, Furina, Yelan, Columbina, Kokomi, Xingqiu
- Strong flex: Mualani, Tartaglia, Ayato, Mona, Nilou, Sigewinne
- Xingqiu is an Opening Character, so do not waste him on Act 1 just because he is free. He is still one of the cleanest off-field Hydro applicators for Emperor of Fire and Iron.
Electro Priority
- Act 3 and general DPS: Raiden Shogun, Cyno, Yae Miko, Fischl, Clorinde, Varesa, Ororon, Iansan
- Act 8 Lunar-Charged core: Flins, Ineffa, Columbina, Kuki Shinobu
- If Flins shows up on a Companion event, take him. He is the on-field Lunar-Charged carry this season.
Dendro Priority
- Core enablers: Lauma, Nahida, Nefer, Alhaitham, Tighnari, Emilie, Kaveh
- Healers you cannot skip: Baizhu, Yaoyao
- Kaveh and Lauma start in the Opening Cast. Use Kaveh as early fodder if he is underbuilt. Hold Lauma if you plan a Bloom or Lunar-Bloom line.
Special Guest Stars
Odette, Sandrone, Nicole, and Sucrose ignore the Hydro/Electro/Dendro lock. Sucrose is the cheapest crowd-control and EM battery in the season. Sandrone and Odette are late-Act or Arcana II insurance if you own them. Nicole is a support flex, not a reason to reroll the lobby.
A deep 4-star bench still wins Theater more often than a single C6 5-star. Xingqiu, Kuki, Fischl, Iansan, Yaoyao, and Sucrose are the units that let you save premium carries. That is the same reason why our best 4-star characters to build guide is helpful to look into as it keeps pointing at Imaginarium Theater: multi-team content punishes shallow accounts.
All Bosses: How to Beat Acts 3, 6, 8 & 10
If you are looking for the September 2026 Imaginarium Theater clear guide, then make sure to learn how you beat acts from 3 to 10 as well. Treat each Climactic Showdown as a reserved roster, not a “whoever is leftover” fight.
Act 3 — Jadeplume Terrorshroom (Lv. 90)
The mushroom stacks Activation from Electro and Catalyze hits, then drops into a paralyzed window after it dumps its fury. It also has very high Dendro RES, so a raw Bloom team often feels like slapping a wall.
How to beat it:
- Fill the Electro gauge on purpose. Raiden, Fischl, Yae, Cyno, or Ororon all work.
- Burst during the stun. Do not waste the window on setup.
- Avoid leaning on Dendro DPS as your only damage.
Sample teams:
- Raiden / Fischl / Xingqiu / flex Dendro
- Cyno / Kuki / Nahida or Lauma / Xingqiu
- Yae / Ororon / Sucrose (guest) / Xingqiu
Note: Do not send Neuvillette or Flins here unless you have no other clear. Act 3 is the first boss, not the hardest.
Act 6 — Emperor of Fire and Iron (Lv. 92)
The crab opens behind a heavy Pyro shield. Hydro is the clean break. Once the armor drops, the boss sits in a long stagger and you dump everything.
How to beat it:
- Bring two Hydro applicators if you can. One applicator plus a slow DPS often times out.
- Neuvillette on-field plus Furina/Yelan/Xingqiu/Columbina off-field is the safest clear.
- Mona can help if you need a cheaper Hydro option and a damage amp.
Sample teams:
- Neuvillette / Furina / Lauma / Mona
- Furina / Yelan / Xingqiu / Kokomi
- Columbina / Xingqiu / Kuki / Nahida (if you already spent Neuvillette)
This is where accounts feel the sting of a thin Hydro bench. If you keep missing the second applicator on banners, using Enjoygm to grab Genesis Crystals for a Hydro rerun is more practical than forcing Act 6 with a single Xingqiu and a prayer. Theater does not give you extra shield-break time because your roster is incomplete.
Act 8 — Battle-Hardened Pipilpan Idol (Lv. 95)
The Idol hides among hats and hops positions in the act 8. The hat with the golden trail is the real target. Electro-Charged or Lunar-Charged damage on that hat stops the swap, shreds the disguise, and dumps a huge chunk of boss HP. Other reactions work poorly here.
How to beat it:
- Identify the gold-trail hat first. Do not spray AoE blindly and lose the target.
- Keep Hydro and Electro auras rolling. Ineffa and Flins make Lunar-Charged much more consistent than old taser teams.
- Columbina is an Opening Character and a reaction enabler. If she is still unused, this is her fight.
Sample teams:
- Flins / Ineffa / Columbina / Aino or Xingqiu
- Raiden / Furina / Yelan / Kuki
- Clorinde / Fischl / Xingqiu / Sucrose
Act 10 — Radiant Moonfly (Lv. 100)
The Moonfly slaps on the Radiant Cocoon. While the cocoon is up, your characters cannot deal CRIT DMG unless they are at full HP. Healing is not an optional flavor. It is the mechanic.
How to beat it:
- Bring a healer who can top the active character quickly: Kokomi, Baizhu, Sigewinne, Yaoyao, or a well-built Barbara in a pinch.
- Furina is awkward unless you can offset her HP drain. Pair her with a stronger healer or leave her on an earlier Act.
- Any leftover DPS works after the cocoon drops. Varesa, Yae, Nefer, Alhaitham, and Iansan are all fine closers.
Sample teams:
- Varesa / Iansan / Collei / Yae
- Kokomi / Yae / Fischl / Nahida
- Baizhu / Alhaitham / Xingqiu leftover / flex Electro
Lunar Mode & Arcana Challenge Guide
Lunar Mode is the real Genshin Impact Imaginarium Theater September 2026 endgame. You still play Acts 1–10, but two Arcana Challenges appear after the first boss. You must finish both before Act 10 or the performance ends. Most clean runs save Arcana until after Act 9 so the leftover roster is your actual best remaining units.
Arcana Challenge I — Shadowy Husks
Three Husk types spawn in pairs and trios: Standard Bearer, Line Breaker, and Defender. The room applies constant HP loss. The challenge is a survival timer, not a single-target DPS check. Shields are a trap against some Husk variants that punish blocked hits.
Clear rules:
- One dedicated healer is mandatory. Sigewinne, Kokomi, Baizhu, Yaoyao, or Furina-plus-healer.
- Kill attendants and small Husks first so the big ones stop gaining extra ATK/RES.
- Keep at least one character standing when the countdown hits zero.
Sample team: Clorinde / Sigewinne / Fischl / Furina
Arcana Challenge II — Battle-Hardened Primordial Bathysmal Vishap
Here, the Vishap drains Energy, then slaps a Hydro shield and Purification Fields. If you cannot pay the Energy cost, the fields eat HP instead. Dendro breaks the Hydro defense fastest. Electro is the backup if your Dendro bench is already spent.
Clear rules:
- Hold a Dendro carry or two if you can see this fight coming from the lobby.
- Sandrone, Odette, Yae, and Beidou-style Electro batteries help if Energy drain is deleting bursts.
- Break the shield, then unload. Do not rotate slowly while fields are still up.
Sample team: Sandrone / Yae Miko / Odette / Beidou
Alt team: Lauma / Nahida / Kuki / Raiden
Best Teams by Act Range
You can now use this as a booking sheet, not a locked script. Theater will not always offer the exact four names.
| Act range | What the fight wants | Characters to reserve | Characters you can burn |
| Acts 1–2 | Any clear, build Flowers | Nothing premium | Kaveh, underbuilt 4-stars, extra Opening units |
| Act 3 | Electro gauge / Catalyze | One decent Electro DPS | Second-string Electro |
| Acts 4–5 | Defense / AoE waves | Maybe Tighnari for redirect stages | Mid-tier Dendro and Electro |
| Act 6 | Hydro shield-break | Neuvillette, Furina, Yelan, Columbina | Extra Dendro supports |
| Act 7 | Generic DPS | Nothing you need for Act 8 | Remaining mid-tier units |
| Act 8 | Electro-Charged / Lunar-Charged | Flins, Ineffa, Columbina, Kuki | Pure Dendro DPS |
| Act 9 | Flex vs Hydro/Pyro mages | One Dendro or Hydro leftover | Whoever is left |
| Act 10 | Full-HP CRIT lock | Healer + any DPS | — |
| Arcana I | Constant HP drain | Best remaining healer | Shield-only units |
| Arcana II | Hydro shield + Energy drain | Dendro core or guest Cryo/Electro | — |
Rewards Worth Playing For
Performance Tour rewards reset every month. Debut rewards do not. A full monthly clear is one of Version 7.0’s more reliable Primogem sinks; and our 7.0 free pulls count lists Imaginarium Theater at up to about 1,000 Primogems across the two resets in the patch.
Typical monthly payouts include:
- Primogems on every Act, with bigger chunks at Acts 3, 6, 8, and 10
- Mora, talent books, Sanctifying Essence/Unction
- Toy Medals and the usual Theater cosmetics track
- Debut extras such as Fragile Resin, billets, and a Crown of Insight at first-time Act 10
If you only have time for one difficulty, clear the highest mode that still lets you finish Act 8–10. Partial Lunar with zero Stella is worse than a clean Visionary full clear.
Conclusion
That is the whole Genshin Impact Imaginarium Theater September 2026 plan: spend cheap characters early, stack one reaction blessing, reserve Hydro for the crab, reserve Lunar-Charged for the hats, and keep a healer alive for the Moonfly and the Husks. Clear on your real roster depth, not on the team you wish you had, and the monthly Primogems are free.
