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Genshin Impact 6.4 Stygian Onslaught Guide: Enemy Info & Team Comps

Time: 2026-03-03 16:11:31

Author: Liam

Greeting! Travelers!

Genshin Impact 6.4 — Stygian Onslaught went live on Mar. 4. Let's dive right in and get you fully prepared for maximum score!

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▍Genshin 6.4 Stygian Onslaught Room 1

Enemy Info

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Battle-Hardened Hexadecatonic Mandragora: Stormvine

Powerful Agglomerated State

Affected by the Ley Line disturbance, when battle begins, this Nemesis enters the Agglomerated State, during which all RES is dramatically increased. While in this state, the Nemesis's Agglomeration Energy is constantly consumed. Dealing Pyro or Electro DMG to the Nemesis drains this energy more quickly. When its Agglomeration Energy is fully depleted, the Nemesis unleashes Sporebloom and switches to the Split State.

Split State

When this Nemesis enters the Split State, it splits into a large number of spores. When these spores take damage, a certain percentage of the total damage is also dealt to the Nemesis. After remaining in the Split State for a period of time, the Nemesis will return to the Agglomerated State. In this case, if the number of spores on the field falls below a certain number, the Nemesis will enter the Brittle Agglomerated State, during which all RES is greatly reduced and its combat abilities are diminished. Additionally, if all spores generated in Split State are defeated, the Nemesis will exit the Split State early and go into the Brittle Agglomerated State instead.

Hollow Structure

Affected by the Ley Line disturbance, when this Nemesis is in the Split State or the Brittle Agglomerated State, its Anemo RES is greatly reduced.

Team Comps

Varka + Venti + Durin + Bennett

Flins + Ineffa + Columbina + Sucrose

Mavuika + Citlali + Xilonen + Kaedehara Kazuha

▍Genshin 6.4 Stygian Onslaught Room 2

Enemy Info

UI_Img_LeyLineChallenge_Gastrobot01(1).png

Knuckle Duckle: Armored Arsenal

Heavy Duckstruction Mode

Due to the effects of the Ley Line disturbance, when battle begins, this Nemesis will go into Heavy Duckstruction Mode, in which its aggression increases. It also generates a Ward for itself that increases all RES, and summons floating Stamping Devices to harass you.

Low-Resistance Stamping Devices

Deal Electro-Charged or Lunar-Charged DMG repeatedly, or simply deal enough damage to destroy the stamping devices to disrupt them. Disrupted devices will lose control and crash into the Knuckle Duckle, dealing a certain amount of damage to its Ward. Destroying the Nemesis's Ward this way will cause it to exit Heavy Duckstruction Mode and become incapacitated from Overloaded. This will also greatly reduce the Nemesis's Electro RES for a certain time.

Fast Frequency-Hopping System

Due to the effects of the Ley Line disturbance, the stamping devices become more resilient — deal more instances of Electro-Charged or Lunar-Charged DMG or more damage to these devices to disrupt them. Electro-Charged or Lunar-Charged DMG dealt to stamping devices will be more effective, and when they lose control and crash into the Knuckle Duckle, the damage dealt to the latter increases based on the total damage taken by the devices.

Team Comps

Flins + Ineffa + Columbina + Sucrose

Neuvillette + Furina + Kaedehara Kazuha + Ineffa

Varesa + Furina + Xilonen + Ineffa

▍Genshin 6.4 Stygian Onslaught Room 3

Enemy Info

UI_Img_LeyLineChallenge_DragonCollar(1).png

Secret Source Automaton: Overseer Device - Obliterator Panoply

Preemptive Sweeper Mode

Will immediately enter Sweeper Mode when combat starts: All Elemental and Physical RES is greatly increased, and it will generate Flow Momentum while performing attacks. The higher its Flow Momentum, the faster it will rotate and the more DMG it will deal.\nIt will lose Flow Momentum after taking Cryo DMG. Below a certain Flow Momentum value, it will stop rotating and attacking, and its All Elemental and Physical RES will be greatly decreased, with its Cryo RES decreasing still more. Each time it enters Sweeper Mode, it will produce additional Elemental Orbs the first time its rotating attacks are stopped.

Forced Counterstrike Mode

If an active character enters and maintains the Nightsoul's Blessing state for a time, this opponent will enter Forced Counterstrike Mode and switch to attacking with powerful tracking rays. At this time, its All Elemental and Physical RES will be decreased. In this state, after it takes a certain number of Cryo DMG instances, it will cease attacking altogether and its All Elemental and Physical RES will be further decreased.

Damage-Resistant Structure

Affected by the Ley Line disturbance, this great foe has its All RES further increased, and it loses less Flow Momentum when struck by Cryo DMG. It will also lose less RES when in Forced Counterstrike Mode.