The September 2026 Imaginarium Theater season is available across Genshin Impact servers, with each region opening it according to its own server reset. Hydro, Electro, and Dendro are the featured elements, so this season strongly favors Electro-Charged and Lunar-Charged teams while still leaving room for Bloom, Lunar-Bloom, Hyperbloom, and Quicken lineups. Completing the highest eligible difficulty and its performance goals awards up to 1,000 Primogems. Players preparing additional resources for future banners may also use Topuplist and the dedicated Genshin Impact top-up page for Genesis Crystals, but no purchase is required to enter or clear Imaginarium Theater.

This season is easier when treated as a resource-management run rather than ten unrelated fights. The important decisions are made before combat: bring enough eligible characters, borrow one carry who solves a difficult stage, invest early Fantasia Flowers in the correct reaction path, and avoid wasting the limited Vigor of characters needed for later bosses.

September Season Rules and Recommended Reactions

The three restricted elements are Hydro, Electro, and Dendro. That combination supports several functional archetypes:

• Electro-Charged and Lunar-Charged for flexible multi-target damage

• Bloom and Lunar-Bloom for Dendro-Hydro teams

• Hyperbloom for low-cost teams built around off-field Hydro, Dendro, and Electro

• Quicken, Aggravate, and Spread for accounts with strong Electro or Dendro carries

Electro-Charged is the safest Brilliant Blessing path because the prescribed opening cast and many common account characters can activate it immediately. Lunar-Charged teams have the highest ceiling when Flins, Ineffa, or Columbina is available, but ordinary Electro-Charged remains useful even without a complete Lunar lineup.

How to Build the Cast

Bring 26 Characters When Possible

Bring every usable Hydro, Electro, and Dendro character until the cast reaches 26. Once the roster passes 22 members, additional cast slots provide valuable basic-stat bonuses. A broad cast also reduces the chance of reaching a late Act without the required element or enough unused supports.

If the account has more than 26 eligible characters, remove poorly built 4-star on-field damage dealers first. Keep healers, shielders, off-field applicators, and low-field-time supports even when their damage is modest. They can complete a team while preserving the Vigor of premium carries.

The Traveler can be changed to an eligible element before entering. Dendro Traveler is usually the most practical choice because sustained Dendro application supports Bloom, Hyperbloom, and Quicken teams.

Best Supporting Cast Borrow

Borrow a high-investment damage dealer from a friend rather than another utility character. Strong options include Neuvillette, Flins, Clorinde, Varesa, Sandrone, and Odette. The exact choice should cover the weakest part of the account: Neuvillette offers exceptional area damage, Flins can anchor Lunar-Charged, while Sandrone or Odette can help assemble a powerful Stellar-Superconduct solution when the Special Guest Stars are available.

Special Guest Stars

All four Special Guest Stars are worth adding because they increase roster depth and open teams outside the normal elemental restriction.

Sucrose is the season's most flexible resistance-shredding option. Viridescent Venerer, crowd control, and Elemental Mastery sharing make her useful in Electro-Charged, Lunar, and Stellar Reaction teams.

Odette and Sandrone work especially well together. A complete Stellar-Superconduct lineup has enough raw output to serve as an emergency team against a stage that would otherwise punish an incomplete roster.

Nicole is the only Pyro Special Guest Star in this lineup. She enables Burning-related options for Kinich and Emilie while also providing shielding and an ATK increase, so she remains useful even when the team is not built entirely around Pyro reactions.

Brilliant Blessing Priority

Prioritize the Hydro-Electro or Electro-Charged branch. Buy the Level 2 blessing before Act 1 if possible, reach Level 3 before Act 2 ends, and secure Level 4 before the first major boss stretch. This route gives immediate value to Xingqiu, Kuki Shinobu, Cyno, Columbina, Flins, Ineffa, and most borrowed Electro or Hydro carries.

Do not spend every Fantasia Flower on random character recruitment. Purchase enough companions to maintain legal teams, then reserve currency for the reaction upgrade that materially improves several Acts.

Key Character Management

• If Nefer is available, save Lauma and Aino for a Lunar-Bloom team. Without Nefer, Lauma can be used early in Hyperbloom.

• Columbina is one of the strongest early carries. Use her to stabilize the opening Acts instead of saving her automatically for the finale.

• If both Flins and Ineffa are owned, separate them when necessary. Flins can handle Acts 5 and 7, while Ineffa can support the Act 8 mechanic team.

• Save at least one dependable Hydro applicator for the shield in Act 6.

• Keep one strong area-damage carry for the first Arcana challenge and one complete premium team for the final boss sequence.

Act-by-Act Route

Act 1

Recommended teams are Lauma, Kaveh, Kuki Shinobu, and Xingqiu, or Kaveh, Kuki Shinobu, Xingqiu, and one Dendro or Electro filler. Choose the Abyss Mage encounter. Before entering, recruit two inexpensive filler characters and buy the Level 2 Electro-Charged blessing.

Accounts without Nefer can use Lauma immediately and play Hyperbloom. Nefer owners should preserve Lauma for later and use a replaceable Dendro or Electro slot. If the opening recruitment offers no workable fourth member, restarting here costs less time than repairing a bad roster in Act 6 or later.

Act 2

Use Columbina, Kuki Shinobu, and two filler characters. Either the excavation-machine encounter or the Natlan saurian group is acceptable. Upgrade the Electro-Charged blessing to Level 3 before moving on.

If no second carry has appeared, Columbina can clear this stage comfortably and does not need to be hoarded. If another carry is already available, preserving one Columbina Vigor charge for Act 8 is useful but not mandatory.

Act 3: Jadeplume Terrorshroom

Use Cyno, Columbina, one Hydro filler, and one Electro filler. Replace Cyno with another trained Electro carry if recruitment provides a better option. Purchase the Level 4 Hydro-Electro blessing before the fight.

Repeated Electro application pushes the Jadeplume Terrorshroom into its activated state and then into exhaustion, creating a large damage window. Save long bursts until the boss becomes vulnerable instead of spending the entire rotation while it is moving.

Act 4: Defense Stage

Use four expendable characters and choose the Ruin Guard route. Kaveh plus three fillers also works. Before starting, recruit two Hydro characters if the option appears; they are insurance for Act 6.

The objective is protection, not maximum damage. Pull enemy attention away from the defense target and fight near the edge. This stage is ideal for consuming weak characters because a premium carry provides less value here than in a timed boss fight.

Act 5

Use Cyno and Xingqiu with two fillers, or any team with reliable area damage. Choose the Rifthound encounter. At the start, run toward a wall so the enemies approach from similar angles and become easier to group.

If Cyno or Xingqiu has already spent both Vigor charges, Neuvillette, Flins, Nilou Bloom, or another area-focused team can replace them. Prioritize continuous coverage over a single large burst because dispersed Rifthounds waste short damage windows.

Act 6: Pyro Shield Boss

Bring any adequately built carry plus a Hydro character. Hydro application is the central requirement because it removes the Pyro shield efficiently. Once the shield breaks, perform a normal damage rotation during the vulnerable phase.

Do not enter with a strong carry and no reliable Hydro application. Even a modestly built Hydro support contributes more to this fight than an extra damage buffer who cannot address the shield.

Act 7

Use any complete team with a trained carry and select the Operative encounter. Choose the Wild Hunt route only when a fully developed Brilliant Blessing team is ready, such as Flins Lunar-Charged or Nefer Lunar-Bloom.

This is a roster check more than a mechanical wall. Avoid combining every premium support with one carry if doing so leaves no functional team for Act 8.

Act 8: Find the Real Hat

Recommended options are a Flins-Ineffa Lunar-Charged core, Neuvillette with an off-field Electro character and two fillers, or another strong Electro-Charged team.

The boss creates multiple hat-like copies. The real target is marked by the light ring on the ground. Locate that ring and trigger Electro-Charged on the correct copy to break the mechanic quickly. Attacking random copies wastes the timer; pause briefly, identify the ring, and then commit the rotation.

Act 9

Use any remaining trained carry with Hydro, Electro, or Dendro fillers. Either encounter is manageable. Accounts with more Hydro damage should choose the Pyro Abyss Mage route, while accounts leaning on Electro or Dendro can choose the Hydro Abyss Mage route.

The purpose of this choice is efficient shield removal. Match the enemy shield to the elements still available rather than selecting only by enemy health.

Arcana Challenges

Arcana 1: Eighteen Shadowy Husks

Neuvillette with his best remaining support and two fillers is the easiest answer. Another high-area-damage carry also works, but bring healing because Corrosion becomes increasingly dangerous as the fight continues.

Shield-dependent teams require care: Shadowy Husks gain advantages when they strike a shielded character. Group them, use sustained area damage, and rely on healing rather than repeatedly feeding their anti-shield mechanics.

Arcana 2: Local Legend Hydro Vishap

Use the strongest remaining carry with an appropriate support, or deploy a complete Lunar-Bloom, Lunar-Charged, or Stellar-Superconduct team. The enemy applies a Hydro shield and drains Energy from the active character while that shield remains.

Breaking the shield reverses the pressure: the party receives Energy and the enemy becomes vulnerable. Focus first on fast shield removal, then use the restored Energy for a full burst rotation. This is one of the simpler late challenges when a complete reaction team has been saved.

Act 10: Final Butterfly Boss

Use the strongest remaining carry, the matching damage support, and a healer. During the battle, the boss applies a debuff that is removed when the affected character returns to full HP. Clearing it grants a damage and CRIT Rate bonus.

A single-target on-field carry can use a focused healer, while teams dealing damage across the whole party benefit more from team-wide healing. Heal proactively instead of waiting for critical health, remove the debuff, and use the resulting offensive buff to finish the damage window.

Final Checklist for All 1,000 Primogems

1. Enter with 26 characters when the account allows it.

2. Borrow a high-investment carry that covers the account's weakest matchup.

3. Prioritize the Electro-Charged Brilliant Blessing path.

4. Save Hydro application for Act 6 and Electro-Charged access for Act 8.

5. Use weak characters in the defense stage instead of consuming premium Vigor.

6. Keep area damage and healing for the Shadowy Husk challenge.

7. Bring a healer to the final boss so its debuff becomes an offensive advantage.

The September season does not demand one exact premium composition. A wide roster, disciplined Vigor use, and early investment in the Hydro-Electro blessing matter more than forcing the same team through every Act. Follow the route above, adapt the filler slots to recruitment, and reserve the correct elements for the two shield checks to secure the full reward consistently.

FAQ

Is the September 2026 Imaginarium Theater available globally?

Yes. It is available on Genshin Impact servers worldwide, but each region opens the season according to its own server reset time.

How many Primogems can the September season award?

Players who complete the highest eligible difficulty and all required performance objectives can earn up to 1,000 Primogems.

Which elements are allowed in the September Imaginarium Theater?

The featured elements are Hydro, Electro, and Dendro. Special Guest Stars can be added even when their elements fall outside the normal restriction.

Which Brilliant Blessing should players prioritize?

The Hydro-Electro or Electro-Charged route is the most consistent choice because it supports the opening cast and remains useful for ordinary Electro-Charged and Lunar-Charged teams.

What should players borrow from a friend?

Borrow a highly invested carry that solves a weak matchup. Neuvillette is excellent for area damage, while Flins, Sandrone, or another premium carry can anchor a complete reaction team.

Where can players prepare Genesis Crystals for future Genshin Impact banners?

Players who choose to supplement their free Primogems can use Topuplist and its Genshin Impact recharge page to prepare Genesis Crystals. Spending is optional and is not required for Imaginarium Theater.