Stygian Onslaught
Stygian Ends in
Stygian boss guide cards

Battle-Hardened Domovoy Sculptor: Gale Hewing
Insider's TLDR
Stygian.moe
• The enemy starts with 90% All RES.
• About 8s after entering combat, the enemy will begin sculpting an ice statue, and will repeat this every 16s.
• While the statue is being sculpted, Stellar Glimmer will cause the ice sculpture to explode: - Deals 1,000,000 HP worth of damage to the enemy. - Grants 1 stack of RES Reduction at 25% per stack for Anemo and 20% per stack for the other elements
• The ice sculptures themselves cannot generate Superconduct stacks
Boss Trait
Big-Mouthed Jack Frost
When battle begins, the Nemesis will harness Anemo energy to create a Prime Ice sculpture. After a short delay, the sculpture will transform into a Big-Mouthed Jack Frost that continuously launches snowballs. Inflict Radiance: Stellar Glimmer on the Nemesis while it is creating the sculpture to interrupt the process and turn the ice sculpture into a harmless animal statue instead.
Creative Frenzy
Due to the effects of the Ley Line disturbance, the Nemesis will start the battle with greatly increased All Elemental RES and Physical RES and will create Prime Ice sculptures more frequently. After an ice sculpture is transformed into a small animal statue, it will explode following a brief delay, dealing damage to the Nemesis and reducing its All Elemental RES and Physical RES, while further reducing its Anemo RES. This effect can stack up to 3 times.

Secret Source Automaton: Overseer Device - Obliterator Panoply
Insider's TLDR
Stygian.moe
• Boss will immediately try to spin and deal great damage, all RES at 200%. If cryo hits are faster than once every 0.6s, once you get the boss below the 10 points threshold for the first time, the whole team will get 36 energy.
• Greatly lower its Cryo RES once stunned to -30%, all other RES at 30%
• In Nightsoul mode, all RES 110% and the boss will spawn 2 pillars that will follow your character. To stop these pillars, you need to keep its gauge at 0.
Boss Trait
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. It 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.

Guardian Blade of Drifting Snow: Endless Reverberation
Insider's TLDR
Stygian.moe
• The enemy's HP initially cannot fall below 80%.
• When its HP reaches approximately 81%, it creates a 42U Cryo Shield. This can occur up to 2 times.
• If the Cryo Shield is affected by a Stellar Glimmer, its remaining shield percentage is converted into an HP shield worth up to 15% Max HP.
• When the Shield is destroyed, the enemy loses 10% HP and its All RES becomes -40% for 10s.
• If it is an HP shield then the enemy takes additional damage equal to up to 9% of its Max HP depending on the initially inherited HP.
• Attacks against shield can trigger effects such as Favonius and Sacrificial weapon passives.
• If the shield is not destroyed within 20s, The enemy restores 10% HP.
Boss Trait
Ice Coffin: Twinned Crystal Lattice
During battle, when the Nemesis's HP falls below a certain threshold, it will encase itself in an Ice Coffin and gain a Cryo Ward to protect itself. While the Ice Coffin is active, the Nemesis will continuously unleash icy storms around itself. If the Ice Coffin is not destroyed, the Nemesis restores a portion of its HP and creates ice swords to launch a counterattack. However, if the Ice Coffin sustaining its life is destroyed, it enters a weakened state for a period of time. Due to the Ley Line disturbance, the Ice Coffin will be more durable. A short time after it is destroyed for the first time, the Nemesis will encase itself in another Ice Coffin.
Ice Coffin: Warped Crystal Lattice
While the Ice Coffin is active, if the Nemesis is affected by Radiance: Stellar Glimmer, the Ice Coffin's Cryo Ward will transform into a shield that absorbs DMG. Once the shield is destroyed, the Nemesis will take a large amount of backlash DMG.
