The August 2026 run of Imaginarium Theater locks you into three elements, Hydro, Electro, and Cryo, and every boss and wave is tuned around the reactions those elements produce. Clearing all Acts and both Arcana Challenges pays out Primogems, Mora, Fragile Resin, and Sanctifying Elixirs, so it is worth pushing as high as your roster allows.
Quick answer: Break the Knuckle Duckle with Electro-Charged or Lunar-Charged, Freeze Hiljetta while she summons armor, use Superconduct or Stellar-Conduct to down the Overseer Network’s drones, and burn the Perpetual Mechanical Array with any strong single-target DPS. Bring a healer for Arcana Challenge I and an AoE team for Arcana Challenge II.
Enemy lineup and levels
Four Acts carry fixed Climactic Showdown bosses, and Lunar Difficulty adds two survival-style Arcana Challenges on top. Here is what you face and at what level.
| Stage | Enemy | Level |
|---|---|---|
| Act 3 | Knuckle Duckle | 90 |
| Act 6 | Battle-Hardened Elite Treasure Hoarder Hiljetta | 92 |
| Act 8 | Battle-Hardened Precursor’s Secret Source Matrix of Overseer Network | 95 |
| Act 10 | Perpetual Mechanical Array | 100 |
| Arcana Challenge I | Shadowy Husk: Standard Bearer, Line Breaker, Defender | 100 |
| Arcana Challenge II | Eremite Stone Enchanter, Desert Clearwater, Scorching Loremaster, Daythunder | 100 |
Combat blessings for this rotation
Because the cycle only allows Hydro, Electro, and Cryo, the Brilliant Blessings all feed those elements. Pick the blessing that matches the boss you are about to fight.
| Blessing | Trigger | Effect |
|---|---|---|
| Electro-Charged Blessings | Electro-Charged or Lunar-Charged reaction | Creates Electrosurge for 3 seconds, boosting Electro-Charged by 250% and Lunar-Charged by 70%. |
| Frozen Blessings | Frozen reaction | Creates “Stinging Chill” for 6 seconds, raising CRIT DMG of all Hydro and Cryo party members by 40%. |
| Super-Conduct Blessings | Superconduct or Stellar-Conduct reaction | Inflicts “Yielding,” cutting Electro and Cryo RES by 5% and Physical RES by 10% for 12 seconds, stacking up to six times. |
Act 3: Knuckle Duckle
The Knuckle Duckle raises a shield and spawns floating Stamping Devices that block most of your damage to its body. Bring Electro and Hydro characters and trigger Electro-Charged or Lunar-Charged to strip that shield, then focus fire the Stamping Devices to drain it faster. Once the shield is down, the boss opens up.
Act 6: Battle-Hardened Elite Treasure Hoarder (Hiljetta)
Hiljetta assembles her battle armor piece by piece, growing stronger with every part she equips. A Hydro and Cryo Freeze team shuts this down. Freeze her while she is summoning armor so each incoming piece triggers Shatter and deals heavy extra damage. Overload also works if you happen to draw Arlecchino or Chevreuse before starting the Act.
Act 8: Battle-Hardened Precursor’s Secret Source Matrix of Overseer Network
At the start of the fight this boss summons four detection devices and can gain a shield if they survive. Use Superconduct or Stellar-Conduct to break the shield and clear the drones quickly. Characters with aerial aim are the best pick for tagging the floating detection devices. Destroy all four and the boss is paralyzed, giving you a clean damage window.
Act 10: Perpetual Mechanical Array
The final boss has no elemental gimmick, so any strong single-target DPS unit can take it down. Its attacks hit hard, so keep dodging. When it splits into four Ruin Sentinels, attack only the one wearing a glowing ring. Defeating that Sentinel stuns and paralyzes the boss, opening your main damage phase.
Lunar Mode Arcana Challenges
Arcana Challenge I: Shadowy Husks
Shadowy Husks keep spawning in groups of two or three, and you must keep clearing them until the countdown runs out. Any strong team clears the damage check, but bring a healer, since your characters lose HP continuously throughout the fight.
Arcana Challenge II: Eremites
Eremite enemies arrive in pairs, and again you clear them until the timer ends. An AoE team handles the grouped spawns best. During this fight the field periodically fires Electro Bursts at your active character, so stay mobile if you are running Pyro units that would take extra damage from that reaction.
Note: Both Arcana Challenges are timed survival stages. Defeating enemies is the only way to advance, so prioritize consistent clear speed over burst on a single target.
Eligible characters this cycle
Only Hydro, Electro, and Cryo characters can be fielded outside of Special Guest Stars. These are your strongest options for filling the Alternate Cast.
| Element | Characters (role) |
|---|---|
| Hydro | Columbina (Sub-DPS/Support), Kokomi (Healer), Furina (Sub-DPS/Support), Neuvillette (Main DPS), Xingqiu (Support), Mona (Support), Tartaglia (Main DPS), Yelan (Sub-DPS), Ayato (Main DPS), Aino (Support) |
| Electro | Flins (Main DPS), Ineffa (Sub-DPS/Support), Varesa (Main DPS), Kuki Shinobu (Support), Fischl (Support), Raiden Shogun (Main DPS/Sub-DPS), Yae Miko (Sub-DPS/Support), Clorinde (Main DPS), Iansan (Support), Ororon (Sub-DPS/Support), Razor (Main DPS/Sub-DPS), Cyno (Main DPS), Kujou Sara (Support) |
| Cryo | Sandrone (Main DPS), Skirk (Main DPS), Lohen (Main DPS), Escoffier (Sub-DPS/Support), Wriothesley (Main DPS), Qiqi (Healer), Shenhe (Support), Citlali (Support), Ayaka (Main DPS), Eula (Main DPS), Rosaria (Sub-DPS), Ganyu (Main DPS) |
Slot a healer or two for the Shadowy Husk survival stage, keep a Hydro and Cryo pairing ready for Hiljetta’s Freeze window, and hold an aerial-aim unit for the Overseer Network’s drones. With those pieces covered and the matching blessing selected before each Act, the full clear, including Lunar Difficulty, is well within reach.
