Genshin 6.3 Luna IV Stygian Onslaught Guide

Hello Travelers! The latest Stygian Onslaught: Blightpurge Battle “Luna IV” is live from January 21, 2026 to  February 24, 2026. The cycle features a new rotation of bosses across three battlefields, with a particular focus on Lord of the Hidden Depths. If you haven’t jumped in yet, take a look at the recommended setups and tips for a smooth full clear.

In this guide, we’ll cover boss mechanics, elemental reactions, and the most effective team strategies to help you overcome every stage of the Stygian Onslaught and claim all the rewards with ease!

 

Basic Rules

This game mode is already live in the current update and features six difficulty levels. Each run requires defeating three consecutive bosses, and starting from Difficulty Level IV, you’ll need to form three non-overlapping teams to take on the challenge.

Teams & Time Limit：

• Levels 1~3 Each Boss 10min. You can use a character more than once, and you can Co-Op by Matching.
• Levels 4~5 Each Boss 120s. You cannot use a character more than once.
• Level 6 Each Boss 120s. If total time is below 180s, you get a better reward.

Dust of Enlightenment  can be used to re-roll artifactsubstats so that you can turn a mediocre artifact into a good one. You can also choose which substats you want to prioritize before re-rolling.

Artifact Rewards：You can choose an Artifact Domain and claim rewards from it via the following methods:

• After completing Level 3 or above, use Resin to claim reward once.
• Every phase there is a 10 day Burst Period, when you can spend an extra 20/40/60 Resin to claim 1/2/3 rewards.

Once the Disturbance Outbreak State ends, you can no longer collect artifact rewards after completing a Battlefield challenge, but can still play the rest of Stygian Onslaught as usual until the event ends.

 

Difficulty Summary

For those seeking Primogems, clearing the D3 is straightforward, as enemies cap at Level 90 with no enhanced mechanics. Fractured D4 increases the challenge but allows Co-Op mode; if you cannot clear it solo, you can call for backup from experienced players to secure victory. Since the rewards include Dust of Enlightenment, it's worth pursuing. Fractured D5 offers the same rewards as Level IV but is solo-only, pitting you against Level 105 bosses with enhanced mechanics. However, if you aim to obtain the Weapon Skins, prepare for a significant challenge!

Simply put:

D3: Open world level difficulty and coop; timer 10 min, able to get all gems. Basic (co-op friendly)

D4: 11-1 abyss difficulty. Enhanced shields/immunities.

D5: 12-3 abyss difficulty or slight higher. Full gimmicks (solo).

D6: even whales would struggle.  Massive HP (10M+ per boss), 120s timers per boss.

D6 Rewards: Weapon Skins

Clearing the challenge rewards a full set of limited-time Weapon Skins, applicable to all weapon types and all elemental visual effects. You can individually enable/disable these skins per character. Completing the stage within 180 seconds upgrades the skins to 5-Star quality, granting them enhanced visual effects.

*Note: These skins purely alter appearance and provide no stat bonuses or gameplay advantages, functioning similarly to Character Outfits.

For example. Observe how the recolored "The Unforged" greatsword perfectly complements Marvuika's aesthetic! This harmonious pairing is truly visually stunning

Recommend Comps

Let's be honest: D6 poses a significant challenge. It requires three fully independent teams (no shared characters) capable of defeating bosses each possessing over ten million HP. This demands considerable investment, placing it firmly within reach of dedicated players with well-developed rosters.

【new】For “Luna IV”, D6 demands high-investment C0-C1 DPS + tuned supports (avg 80+ Lv., key C1s). HP: ~23M (Ch1), 17M (Ch2), 14M (Ch3). Focus Lunar Reactions (x3 shield DMG, +36 energy first proc), Electro-Charged (x6/x2 Lunar), minion crashes (12U shield shred +1.5% HP).

Below are our recommended team compositions and key Constellations to help you claim the radiant Weapon Skins!

Floor 1	Floor 2	Floor 3
Lord of the Hidden Depths: Whisperer of Nightmares	Battle-Hardened Fireblade Shock Trooper: Forlorn Hope	Emperor of Fire and Iron: Ordained Conquest

For Chamber 1

Enemy Mechanics:

The Lord of the Hidden Depths: Whisperer of Nightmares creates a Deepdark Shield equal to 45% of its max HP (roughly 5.6M on Fearless / 10.6M on Dire), which takes 300% increased Lunar Reaction DMG but is fully immune to Physical DMG. The first Lunar hit on the shield generates Elemental Orbs restoring 36 Energy; during its Ult charge, it summons four Anglers (each at 18% of boss HP), and defeating each one reduces the shield by 25%. Breaking the shield fully removes 20% of its max HP and triggers a Weakened state with all RES at -60% for the duration.

Combat Mechanics:

Lunar Reactions deal 300% increased DMG to the Deepdark Shield, so teams with consistent Lunar application and AoE shine for rapid breaks, while Physical DMG is completely ineffective. After the initial break, you get a 60% all RES window to burst down the boss before it potentially resummon Anglers around 60s later; defeating them mid-charge prevents a massive AoE devour.

The shield's 45% HP value is substantial but manageable, allowing high-application squads to chain breaks and leverage the first Lunar proc's 36 Energy for smooth rotations.

Once the shield shatters, the boss loses 20% max HP outright, creating your prime DPS phase to unload bursts, recharge, and capitalize on the prolonged Weakened state.

Recommended Team Compositions:

D6 Recommended Teams
Nefer	Columbina	Lauma	Nahida
Flins	Columbina	Ineffa	Sucrose
Nefer	Nilou	Lauma	Nahida
D1-D5
Columbina	Ineffa	Sucrose	Fischl
Mavuika	Kazuha	Xilonen	Citlali

For Chamber 2

Enemy Mechanics:

The Battle-Hardened Fireblade Shock Trooper: Forlorn Hope deploys three layers of regenerating Shields (each worth 4.5% of its max HP), boosting all RES except Electro by 60% while self-repairing rapidly—though Electro-Charged takes 600% increased DMG and Lunar-Charged takes 200% increased DMG, nearly halting repairs on hit. Each layer broken removes 6% of its max HP and generates orbs restoring 18 Electro Energy plus 6 of others; clearing all three within the time limit weakens it with all RES dropping by 50% (Electro RES further reduced by 60% post-recovery), preventing its Thundering Suite activation.

Combat Mechanics:

Electro-Charged (600% DMG) and Lunar-Charged (200% DMG) shred the regenerating multi-layers rapidly, so Hydro + Electro teams excel at halting repairs and chaining breaks, outperforming pure brutes.

Each layer pop grants 18 Electro + 6 other Energy orbs and a brief window to reposition before the next regen cycle; fail the full clear in time and risk Thundering Suite's escalating AoE lightning. The layers' quick self-repair demands steady application, enabling reaction squads to force frequent weakens without overcommitting.

Clearing all three triggers a -50% all RES (further -60% Electro post-recovery) nuke window, your key slot for full bursts, energy funneling, and massive sustained damage.

Recommended Team Compositions:

D6 Recommended Teams
Mavuika	Xilonen	Citlali	Fischl
Flins	Ineffa	Sucrose	Aino
D1-D5
Columbina	Ineffa	Sucrose	Bennett
Varesa	Mavuika	Chevreuse	Iansan

For Chamber 3

Enemy Mechanics:

The Emperor of Fire and Iron: Ordained Conquest starts with 64U Pyro on its twin horns, granting 150% all RES; it summons up to three Sternshield Crabs (each with 12U Pyro), which channel to the horns until depleted—then they crash into the boss, stripping 12U Pyro and dealing bonus DMG equal to 60% of Hydro DMG absorbed plus 10% of other DMG, capped at 15% of boss max HP. Destroying the horns fully removes 10% of its max HP and creates a brief paralysis window, after which they temporarily cannot regenerate.

Combat Mechanics:

Hydro application maximizes Sternshield Crab crashes (60% Hydro-scaled +10% other DMG, cap 15% boss HP per crash), so AoE Hydro teams with grouping outperform singles for multi-target shredding, while direct horn hits work but lag behind.

Each depleted Crab strips 12U and forces a collision after a short delay, yielding quick windows to repeat before the next spawn (max 3 active); ignoring them lets horns regen endlessly. The 64U total is hefty yet breakable, pushing applicator-heavy comps into rapid cycles of summon-crash-break.

Destroying the horns removes 10% max HP and stuns briefly for double NA bursts, your core phase to refill, buff up, and exploit the no-regen downtime.

Recommended Team Compositions:

D6 Recommended Teams
Neuvillette	Kazuha	Xilonen	Furina
Neuvillette	Citlali	Escoffier	Furina
D1-D5
Neuvillette	Skirk	Escoffier	Furina
Neuvillette	Kazuha	Citlali	Furina

Conclusion

Conquering the Stygian Onslaught: Blightpurge Battle “Luna IV” is no small feat, especially for Travelers aiming to secure the prestigious 5-Star Weapon Skins in Difficulty 6. Remember, raw damage alone won't be enough to chew through the massive HP pools of this cycle. Success lies in mastering the specific mechanics: utilizing Lunar Reactions to shatter the Lord of the Hidden Depths, maintaining Electro-Charged uptime to halt the Shock Trooper’s repairs, and strategically crashing Sternshield Crabs into the Emperor. By sticking to the recommended team compositions and focusing on these elemental counters, you can turn these daunting 23M HP encounters into manageable victories.

If you find your roster lacking the firepower needed for these independent teams, or if you want to pull for key units like Nefer, Columbina, or Lauma to gain an edge, remember that LDShop is your trusted partner for safe, affordable, and instant Genesis Crystals.

The Blightpurge Battle is live until February 24, 2026, so take your time to tune your builds and practice your rotations. Good luck, Travelers—may your clears be swift and your rewards plentiful!