[V6.2] Genshin Impact Luna III Stygian Onslaught Guide

Stygian Onslaught is Genshin Impact's hardest permanent endgame content, challenging players to face three powerful boss enemies across six escalating difficulty stages. The Version 6.2 Luna III phase brings new boss rotations and mechanics that will test even the most experienced players.

This guide will help you clear Stygian Onslaught by breaking down boss mechanics, providing team recommendations, and offering strategic tips to complete all difficulty levels, especially the challenging Menacing (Difficulty 4), Fearless (Difficulty 5), and Dire (Difficulty 6) tiers.

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Difficulty Levels

Boss 1: Iniquitous Baptist

Mechanics & Tips:

The Iniquitous Baptist generates three consecutive elemental shields in a specific order: Electro Ward (12U strength), Pyro Ward (18U strength), and Hydro Ward (18U strength). Each shield must be destroyed using elemental reactions with only 3 seconds between each phase. For the Electro Ward use Cryo or Dendro, for the Pyro Ward use Hydro, and for the Hydro Ward use Cryo or Dendro. Each shield break deals 50% of absorbed damage (capped at 12.5% max HP) as damage to the boss, and breaking all three shields triggers an 18-second paralysis window.

An important strategy is to attack constantly during shield phases because damage dealt to shields translates to bonus damage when the shield breaks. Don't save your abilities or energy thinking you need to wait for the vulnerable phase, as aggressive play during shield phases actually maximizes your total damage output.

Recommended Teams

Bloom/Hyperbloom Teams

These teams use Dendro plus Hydro cores with an Electro trigger to effectively counter all three elemental shields in sequence. The Dendro application handles both the Electro and Hydro wards, while the Hydro application breaks the Pyro ward, making this the most versatile team archetype for Iniquitous Baptist. Team 1 offers the highest damage potential with Nefer and Lauma's strong Dendro application. Team 2 provides excellent survivability with Shinobu's healing while maintaining consistent Hyperbloom reactions. Team 3 focuses on Neuvillette as the main DPS with Nahida enabling Bloom reactions and Fischl triggering Hyperblooms.

Freeze Teams

Freeze teams using Cryo and Hydro combinations provide the dual element coverage needed to handle two of the three shields effectively. These teams excel during the paralysis window after breaking all three shields, locking down the boss for massive damage. Team 1 leverages Skirk's powerful Cryo application with Neuvillette's consistent Hydro for high-end players. Team 2 is the classic Skirk-Escoffier Freeze team. Team 3 offers a more budget-friendly option with accessible 4-star characters while maintaining strong Freeze uptime.

Boss 2: Battle-Hardened Iktomisaurus

Mechanics & Tips:

The Iktomisaurus floats into the air twice during battle: immediately at battle start and again around the 1-minute mark. While airborne, it deploys a 24U Cryo Shield and all party members instantly receive full Elemental Burst energy including special energy for Mavuika and Skirk. Cryo Gadgets spawn on the field (destroying each removes 9.6U from the shield), while Disruption Vortexes (Cryo tornadoes) appear and can be pulled with Anemo skills. The boss has 70% resistance to all elements initially and 110% Cryo resistance, but destroying Decoy Vortexes reduces Anemo resistance by 35% stacking up to 3 times.

The shield breaking window is absolutely critical. If the shield is broken, the boss falls and takes 10% max HP damage plus 50% of absorbed damage (capped at 35% max HP) plus fall damage, then becomes stunned for a damage window. However, if the shield is NOT broken before the timer expires, the boss unleashes Frosthail Execution which instantly defeats your active character with no chance of survival. Make shield breaking your absolute top priority when the boss goes airborne.

Recommended Teams

Hexerei Teams

These teams control the battlefield while breaking shields efficiently. Venti can pull in Disruption Vortexes to prevent them from disrupting your movement and attacks, while also dealing significant Anemo damage once you've reduced the boss's Anemo resistance. Team 1 features Venti as the main DPS, who can also break enemy shields efficiently by spreading the Pyro applied by Durin. Team 2 focuses on Venti's grouping with strong Pyro application. Team 3 uses Wanderer as the main DPS with Anemo resistance shred from destroying Vortexes.

Sunfire Jean Teams

Sunfire Jean (Jean plus Bennett) creates a powerful combination that breaks the Cryo shield efficiently through constant Pyro application. Team 1 combines Sunfire mechanics with Mavuika's burst damage. Team 2 features a similar Arlecchino team enhanced by Yelan’s off-field damage.

Jean Fall Damage Cheese Team

This is the most budget-friendly and highly effective strategy. Use Amber's Burst to quickly break the Cryo shield, then use Jean's Elemental Skill to grab the falling boss mid-air and drag it repeatedly against Zhongli's pillar or Geo Traveler's construct for massive fall damage that bypasses the boss's high elemental resistances. This strategy works even with low-investment Jean with minimal artifacts, and the fall damage scales with the boss's max HP. Team 1 is the premium version with maximum comfort. Team 2 uses Albedo's elevator for additional fall damage opportunities.

Boss 3: Experimental Field Generator

Mechanics & Tips:

The Experimental Field Generator creates a Gravity Reduction Field where characters can jump significantly higher, and reaching a certain height grants a 600% ATK increase for 1.5 seconds that applies to any damage dealt during this window. The boss channels Ousia energy to create the Gravity Field, and you can hit the exposed Ousia core with 3 Pneuma attacks to shut down the field temporarily, though this is generally not recommended as you want the gravity buff active. Gravitational shockwaves continuously erupt and cannot be dodged, but they deal manageable damage if you're keeping up with the mechanics.

The combat strategy is to jump first to gain height, then activate damage skills while descending or immediately after landing since the 600% ATK buff triggers at peak height. Time your abilities to utilize the full 1.5-second buff window for maximum damage output. Failing to utilize plunge attacks properly increases the boss's damage output significantly and extends the fight unnecessarily, so mastering the jump-buff-attack rhythm is essential for success.

Recommended Teams

Plunge Teams

These teams center around characters specifically built for plunge combat with kits that naturally synergize with the gravity mechanics. Team 1 uses Varesa as the primary recommendation since she's designed for plunging attacks, with Bennett's ATK buff stacking multiplicatively with the 600% plunge buff and Kazuha providing elemental damage buffs. Team 2 maximizes Gaming's plunge-focused kit with Xianyun enhancing his plunge damage even further and Furina for additional buffs. Team 3 is the traditional Xiao hypercarry setup where his entire kit revolves around aerial combat, paired with Xianyun for healing and battery support.

In conclusion, a solid understanding of each boss’s mechanics, combined with proper team composition and sufficient character investment, is the key to consistently clearing all stages. Taking the time to learn attack patterns, shield behaviors, and elemental interactions will significantly improve both your efficiency and overall experience. If you find yourself lacking certain characters or resources to complete the challenges comfortably, you may consider topping up Genshin Impact through our trusted platform, LootBar.gg. With secure transactions and potential discounts available, it can help you strengthen your roster and better prepare for future endgame content with confidence.

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