Genshin Imaginarium Theatre 2026: Lunar Mode Boss Guide

The new year has officially kicked off in Teyvat, and with it comes a refreshed, high-voltage rotation for the Imaginarium Theatre. As we move deeper into the 2026 calendar, HoYoverse has turned up the heat, and the current, by restricting the January 2026 season to Pyro, Hydro, and Electro elements. For those tackling the Lunar Mode (formerly Visionary Mode), this rotation is a dream for reaction-heavy teams but a logistical puzzle for those with a limited roster.

This guide will explain the Act 10 bosses and the new season’s hidden mechanics, whether your goal is to obtain the entire 1,800 Primogem payout or you’re just trying to get through the “Lunar Arcanum” without losing your best units.

The official Genshin Impact news hub is the main source for travelers seeking the most recent information on Phase II and III story unlocks and celebratory rewards.

The January 2026 Roster: Principal and Guest Stars

Unlike the Spiral Abyss, the Theatre demands a wide pool of characters. For Lunar Mode, you’ll need to field 28 to 32 characters at Level 70 or higher to meet the entry requirements.

Principal Cast (The Starting Six)

This month’s “Principal Cast” consists of characters provided as trials for everyone, ensuring you have a baseline for the Pyro-Hydro-Electro meta:

• Mavuika (Pyro): The heavy-hitting anchor for Vaporize and Overload teams.
• Clorinde (Electro): High-speed Electro application, perfect for the Knuckle Duckle Act.
• Sigewinne (Hydro): Reliable off-field Hydro application and healing.
• Dahlia (Hydro): A specialized unit that thrives in high-frequency reaction teams.
• Yanfei (Pyro): A reliable range-focused DPS for hitting aerial boss weak points.
• Iansan (Electro): Essential for managing the Vigor mechanics and quick rotations.

Special Guest Stars

HoYoverse has thrown a few elemental curveballs into the guest list to help bypass the elemental restrictions:

• Venti (Anemo): Crowds the Shadowy Husks in Arcanum 1 like no other.
• Xianyun (Anemo): Enables the powerful plunge meta for characters like Gaming or Diluc.
• Xilonen (Geo): Provides the shred and defensive utility needed for the Emperor of Fire and Iron.
• Collei (Dendro): The lone Dendro representative, enabling Hyperbloom and Burgeon for those lucky enough to draft her into their cast.

By following the official Genshin Impact X (Twitter) account, where developers share celebratory community milestones and real-time updates during the Lantern Rite, you can stay ahead of the curve.

Acts 3, 6, 8, and 10: Boss Guide

The “greatest hits” of mechanical bosses that reward high elemental application and particular reaction triggers are part of the January 2026 rotation.

Act 3: Perpetual Mechanical Array (PMA)

The PMA serves as the first major gear check.

• The Gimmick: At 35% HP, it enters an “Absolute Defense” state and splits into four Ruin Sentinels. You must defeat the sentinel with the glowing ring to weaken the main body.
• January 2026 Strategy: Since you have Hydro and Electro available, Electro-Charged is your best friend here. It provides consistent damage while the sentinels are grouped. Use Clorinde or Raiden to maintain the aura while Sigewinne or Xingqiu applies Hydro.

Act 6: Emperor of Fire and Iron (The Spicy Crab)

This boss is a “Pyro shill” with massive resistances while its horns are active.

• The Gimmick: Its Pyro horns grant it a massive shield. You must use Hydro or Electro reactions to break the crown.
• The Strategy: This is where Sigewinne and Dahlia shine. Use Hydro to deplete the Pyro meter. When the horns shatter, the boss is paralyzed for roughly 10 seconds; this is your window to dump every Burst you have.

Act 8: Knuckle Duckle

A newer boss that rewards “tells” and reactionary play.

• The Gimmick: It periodically creates a purple radar circle that marks a high-damage splash zone.
• The Strategy: Triggering Electro-Charged or Lunar-Charged reactions breaks its “armored mode” faster. Don’t face-tank its slams; wait for the telegraph, dodge, and then use Iansan or Clorinde to overwhelm its poise.

Act 10: Maguu Kenki (Lunar Final)

The ultimate test of January 2026.

• The Gimmick: At Level 100, this Maguu Kenki is fast and hits like a truck. It uses a phantom to double its attack range.
• The Strategy: Since you are limited to PHE (Pyro, Hydro, Electro), Vaporize teams using Mavuika and Yelan/Xingqiu are the most reliable way to hit the DPS threshold. Be wary of its ice floor; while you can’t be frozen (no Cryo on the field), the slowdown can ruin your rotation timing.

If you’re looking for detailed character showcases and event breakdowns for the new Liyue roster, the HoYoLAB community forum is a goldmine of player-driven information and guides.

Lunar Arcanum Challenges: The True Endgame

Lunar Mode introduces two “Arcanum” stages that appear after Act 1. These are optional but required for the maximum “Toy Medal” rewards.

1. Arcanum 1: Shadowy Husks: You must defeat 17 Husks before the timer expires. Avoid Shields. If a Husk hits a shielded character, they trigger massive team-wide healing or buffs for the enemy. Use Venti (Guest Star) to group them and pure healing (Barbara or Sigewinne) for survival.
2. Arcanum 2: Super-Heavy Landrover: A massive mechanized fortress that acts as a Pyro-mech boss. It is highly susceptible to Electro-Charged damage, which can “short-circuit” its mobility.

Act	Boss	Key Weakness	Recommendation
Act 3	PMA	Multi-target Electro	Save Clorinde or Fischl
Act 6	Emperor Crab	Hydro Application	Save Sigewinne or Neuvillette
Act 8	Knuckle Duckle	Telegraphed Dodges	Use Iansan for mobility
Act 10	Maguu Kenki	High-Burst Vaporize	Save Mavuika and Furina/Yelan

Pro Tips for Vigor Management

The biggest mistake players make in the January 2026 rotation is “over-investing” in the early acts.

• Save Your Anchors: Do not use Mavuika or Neuvillette on the first two stages. You will need their high Vigor for the Act 8 and Act 10 bosses.
• The “Filler” Strategy: If an act is a simple mob-clear, use your unbuilt ” fodder” units alongside one mid-tier DPS (like Yanfei) to preserve your 5-star characters for the Arcanum challenges.

FAQs

1. How many Toy Medals can I get in January 2026?

You can earn up to 3 Toy Medals per season by clearing Acts 3, 6, and 8 on the highest difficulty.

2. Why can’t I use my Nahida or Zhongli?

Unless they are listed as “Special Guest Stars,” you are restricted to Pyro, Hydro, and Electro only this season. This makes reaction teams like Hyperbloom much harder to build than usual.

3. Is “Lunar Mode” permanent?

Yes, it is the highest difficulty tier (Act 1–10 plus 2 Arcanum stages) designed for players with a massive, well-built roster.

4. What happens if I fail an Arcanum challenge?

In Lunar Mode, Arcanum challenges can be abandoned or retried without consuming the Vigor of your characters, allowing you to “practice” your team compositions.

A High-Voltage Start to 2026

The January Imaginarium Theatre is a celebration of the Pyro, Hydro, and Electro triumvirate. While the boss lineup for Acts 8 and 10 might look intimidating, the generous “Opening Cast” provided by HoYoverse gives even F2P players a fighting chance to clear the main acts. Success comes down to disciplined Vigor management and knowing when to use your Guest Stars to bypass elemental walls.

If you find your current roster is too thin to meet the 28-character requirement for Lunar Mode, you can find Genshin Impact accounts that feature a wide variety of built supports and sub-DPS units. For those who already have the roster but need that final constellation for Clorinde or Mavuika to clear Act 10, utilizing Genshin cheap top up services is the most efficient way to secure your victory before the next rotation.