Stygian Onslaught Luna VII / 6.6 Best Characters and Teams in Genshin Impact

Twin Half-Tulpas

Affected by the Ley Line disturbance, 2 Half-Tulpas will emerge during the challenge at intervals. After some time, the Hydro Tulpa will absorb Half-Tulpas to enhance itself: It will heal a large amount of HP and grow larger, its ATK will increase, and it will launch more dangerous attacks.
Use attacks or Elemental Reactions to destroy the Half-Tulpas in time or Freeze them to interrupt this absorption.

Torrential Flurry

Affected by the Ley Line disturbance, the Hydro Tulpa will deploy a Shield during the challenge and enter a charging state as it prepares to launch Torrential Flurry. If it is successfully unleashed, your current active character will be immediately defeated.
When the Hydro Tulpa deploys its Shield, all party members' Elemental Skill and Burst CDs will be reset, while their Elemental Energy, Fighting Spirit, and Serpent's Subtlety will be restored. Breaking the Shield before the Hydro Tulpa can charge up will interrupt Torrential Flurry.

Ancestral Wolf Spirit: Manifestation

At the start of the combat, the powerful opponent will summon an "Ancestral Wolf Spirit" to fight by its side. Affected by the Ley Line disturbances, the opponent is invulnerable to all DMG while blessed by the spirit. As a spiritual entity, the "Ancestral Wolf Spirit" is protected by a special Cryo Ward that can only be broken by Pyro or Electro Swirl Reactions. Once the Ward is shattered, the spirit will vanish, leaving the opponent temporarily paralyzed and dealing massive backlash DMG. The more DMG the Ward absorbs while it is active, the greater the backlash DMG will be; furthermore, Pyro and Anemo DMG will further increase this backlash DMG.

Oversight of Vigil

When combat begins, the Open-Eyed will enter the "Oversight of Vigil" state. While in this state, it tracks the number of times it takes Pyro/Hydro/Electro/Cryo DMG. When the number of hits from any one element reaches 5, it will exit this state and record that element as a monitored target. If no element is successfully monitored, the record will remain empty, and it will instead deal a single instance of Geo DMG. After the first "Oversight of Vigil" ends, the enemy will re-enter this state again after a set interval. Due to the effects of the Ley Line Disturbance, the second monitoring phase lasts longer, and elements that have already been recorded will require a significantly higher number of hits to be monitored again. Due to the effects of the Ley Line Disturbance, the Open-Eyed will have increased Elemental and Physical RES during "Oversight of Vigil."

Phenomena's Delirium

After completing two rounds of Elemental Monitoring, the Open-Eyed will take to the air and begin preparing "Phenomena's Delirium." It will release the previously recorded elements and summon two corresponding Active Elemental Stars. If no elements were recorded, it will instead summon Inert Elemental Stars with high resistance to all elements and Physical DMG. If the enemy summons two Active Elemental Stars of different elements, both stars will become easier to destroy. When an Active Elemental Star is destroyed, it deals a large amount of damage to the enemy based on the recorded element. If an Inert Elemental Star is destroyed, it instead deals Geo DMG to the enemy. Destroy all Elemental Stars to interrupt the preparation of "Phenomena's Delirium." If both stars are not destroyed within the time limit, they will explode, dealing massive AoE damage.