Complete Honkai: Star Rail MoC 4.0 Floor 12 Zero-Cycle Clear

What is MoC 4.0 and Zero-Cycle Mode?

Memory of Chaos 4.0 runs from December 8, 2026, to January 19, 2026, introducing Floor 12, the peak difficulty checkpoint. Zero-Cycle demands clearing bosses within one combat cycle—no extra rounds or character deaths allowed. Achieving this requires managing skill points, stacking Weakness Breaks, and eliminating summons quickly. Zero-Cycle clears showcase mastery over Floor 12’s strict mechanics and unlock maximum rewards.

Floor 12 splits into two halves with distinct enemy types and elemental weaknesses. Succeed by exploiting these, using tight team synergy, and balancing resource priorities.

Floor 12 Enemies and Mechanics

Enemies

First Half:

• Cyclonic Swarm Mother summons Mirage Fizzle Kids with 30% damage reduction; kill summons early.
• Stellaron Hunter Sam phases through Combustion triggered by Molten Energy; hit molten counters 5 times to refill skill points and break Combustion.

Second Half:

• Noontide Gryphon stacks Fire damage via Aquila’s Mark, linked to a Whirl mechanic triggered by ally hits.
• Borisin Warhead Hoolay activates Moon Rage to boost speed and damage; block Lupine Chase summons.

Key Mechanics

• Exploit elemental weaknesses: Quantum/Lightning (First Half), Physical/Fire (Second Half).
• Each Hit Per Action counts to stack Memory Turbulence and increase damage.
• Remove summons early to prevent prolonged immunity and damage spikes.
• Manage skill points efficiently, especially on Sam’s Molten Energy counters.
• Apply Weakness Breaks during Moon Rage to block dangerous calls.

Firefly Team Composition and Builds

Core Characters

• Fugue: Main DPS with high Fireburst damage, leveraging Firefly buffs.
• Ruan Mei: Physical/Fire hybrid, provides debuffs complementing Fugue.
• Lingsha: Support offering shields and energy regeneration.

Gear and Relics

• Prioritize Energy Regeneration to maximize ultimate uptime.
• Use Firefly’s signature Fire weapons or those boosting skill point gains.
• Relics with Energy Regen, Crit Rate, and Fire Damage Bonus preferred.
• Sets boosting Fire damage or shields match team needs.

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Bronya Team Optimization

Core Build

• Bronya: DPS and energy regen powerhouse with a Light Cone needing 600+ Undying Starlight for 18% energy regen and +50% damage at Skill 5.
• Partners include Phainon (Physical DPS), Sunday/Cerydra/Tingyun (healers/utilities), and Remembrance Trailblazer/Dan Heng (extra damage/control).

Equipment

• Focus on relics enhancing Energy Regeneration and Physical/Fire damage depending on pairing.
• Weapons emphasizing Crit Chance and Attack to boost sustained damage.
• Investing in Bronya’s Light Cone greatly boosts team damage and uptime.

Step-by-Step Zero-Cycle Clear Guide

Turn Priorities

First Half:

1. Kill Cyclonic Swarm Mother to reduce summon pressure.
2. Use offensive skills to hit Sam’s Molten Energy counters 5 times, breaking Combustion and restoring skill points.
3. Clear summons promptly to avoid prolonged buff phases on bosses.

Second Half:

1. Apply Weakness Break on Hoolay during Moon Rage to block Lupine Chase.
2. Clear Sableclaw and Eclipse Wolftrooper summons quickly.
3. Save skill points for burst windows to maximize damage.

Combos and Elemental Reactions

• Firefly comp chains Fire elemental combos and Physical attacks for massive damage.
• Bronya’s buffs increase Energy Regen for near-constant ultimates and Weakness Break stacking.
• Sync skill use and summons with boss vulnerability windows.

Firefly vs Bronya Team Effectiveness

Firefly:

• Strengths: Explosive Fire burst damage ideal for Phase 2 bosses.
• Limits: Requires tight timing and high energy regen management.

Bronya:

• Strengths: Consistent Physical DPS, skill point recovery, energy regen.
• Limits: Investment-heavy in Starlight for Light Cone upgrades.

Firefly suits burst-focused players; Bronya favors sustained zero-cycle consistency. Choice depends on characters, relics, and farming stamina.

Exclusive Recharge Bonuses for Firefly & Bronya

Bonus Details

• Codes grant Stellar Jade, crafting materials, and consumables.
• Bronya’s Light Cone unlock needs 600 Undying Starlight for energy regen and damage boosts.
• Active codes: THEDAHLIA, OMEGA, STARRAILGIFT grant valuable rewards.

Redeeming via BitTopup

• Buy recharge currency affordably and quickly with BitTopup.
• After buying, complete “A Moment Of Peace” mission to unlock Mailbox.
• Input codes in Redemption menu, claim rewards instantly.

BitTopup offers reliable service to never miss recharge bonuses and speed up Floor 12 progress.

Common Mistakes and Optimization

• Ignoring elemental switching from Quantum/Lightning to Physical/Fire reduces damage severely.
• Failing to kill summons early extends fights and wastes cycles.
• Poor skill point use blocks burst combos.
• Overusing resources early makes second half harder.

Optimize stamina by focusing on one team (Firefly or Bronya) to farm efficiently. Use BitTopup to top up gems and coins without downtime.

Community and Patch Notes

• Version 3.8 (Dec 2025) and 4.0 (Feb 2026) buffs improve Memory Turbulence stacking and Light Cone energy regen, favoring zero-cycle multi-hit combos.
• Pro tips: stack up to 10 Memory Turbulence for True DMG triggers, sync ultimates post-Weakness Break, use summons strategically.

FAQ

Q1: How to clear MoC 4.0 Floor 12 Zero-Cycle?
Exploit weaknesses (Quantum/Lightning, then Physical/Fire), manage skill points, remove summons early, stack Weakness Breaks. Use Firefly or Bronya teams for optimized damage.

Q2: Which team is better, Firefly or Bronya?
Firefly suits burst Fire damage; Bronya offers sustained DPS and energy regen. Both meta-viable; choice depends on character investment.

Q3: Best relic stats for Floor 12?
Energy Regen, Crit Rate, Elemental Damage Bonus. Fire damage sets for Firefly; Physical damage and shields for Bronya.

Q4: How do I redeem recharge bonuses?
Unlock Mailbox by finishing “A Moment Of Peace.” Input codes in Redemption menu. Use BitTopup to buy recharge currency affordably.

Q5: Common Floor 12 mistakes?
Ignoring summons, wrong elemental targeting, poor skill point use, missing Weakness Break windows.

Q6: Do patches affect Floor 12 strategies?
Yes. Updates buff Memory Turbulence stacking and Light Cone effects, promoting energy regen and multi-hit combos critical for Zero-Cycle.

Ready to clear MoC 4.0 Floor 12 Zero-Cycle? Use BitTopup to grab exclusive recharge bonuses and power up your Firefly or Bronya teams fast. This guide arms you with proven tactics for smooth, efficient clears and max rewards.

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