Boss Overview
The Secret Source Automaton: Configuration Device - Lysis Shears has 8.121.748 HP for Fearless and 23.114.376 HP for Dire. The main gimmick is the Adaptive Countermeasures: Cold Start.
The boss begins the fight protected by a strong shield and gains high All Elemental RES and Physical RES. You must counter the mechanic using characters in Nightsoul’s Blessing to fill up the bar and stun the boss.
Mechanics
Cold Start
At the start of the fight, the Secret Source Automaton has a 200% max HP shield and very high resistance. In this state, the boss naturally accumulate Adaptive Countermeasures at a very slow rate. Characters in Nightsoul’s Blessing are the key because they will fill up the bar much faster. The more Nightsoul characters you bring, the faster the bar will fill up but you should prioritize bringing at least one.
Adaptive Countermeasures
Once the boss has built enough Adaptive Countermeasures progress, it will take 50% of all the DMG dealt during the Cold Start and begin to perform a laser sequence and then begins charging its Boltsphere Cannon. Its resistance will return to normal and you have a small damage window before the next phase.
Solid Phlogiston Pillars
When the boss charges the Boltsphere Cannon, it summons two Accretion Mechanisms on top of Solid Phlogiston pillars. These devices are protected from ranged attacks, so you cannot simply shoot them from the ground. You need to climb or fly up to destroy them from close range.
If you destroy both, the boss:
- Takes 15% of its max HP as damage.
- Becomes paralyzed for around 15 seconds.
- Has its All RES reduced to -30%, making this the best damage window of the fight.
If you fail to destroy them in time, the boss completes Boltsphere Cannon and releases a large Electro AoE.
Best pillar solutions:
- Kachina: very good budget option because she can enter Nightsoul and climb the pillars.
- Xilonen: excellent because she gives support value and can climb quickly.
- Kazuha, Venti, Wanderer, Chasca, Kinich, and other vertical-mobility units: can help reach the devices if you lack the intended Natlan climbers.
- Alternatively you can learn the specific locations to climb up the pillar without these units.
Best Teams
Nightsoul Carry Teams
These are the most comfortable teams because the main DPS or core units naturally help solve Cold Start.
C0 Mavuika
R5 Serpent
C6 Chevreuse
R5 Fav Lance
C6 Iansan
R5 Rightful
C6 Ororon
R5 Stringless
C1 Mualani
R1 Surf's Up
C2 Mona
R5 Pamber
C6 Sucrose
R5 Sac Frag
C6 Lumine
R5 Sac Sword
Mavuika overload is the best in slot team to deal with this boss because there are 3 natlan characters naturally in the team.
Teams with Nightsoul Flex
C2 Nefer
R5 Dawning
C0 Lauma
R5 Etherlight
C0 Columbina
R5 Fav Codex
C4 Ororon
R5 Fav Bow
C0 Skirk
R1 Azurelight
C0 Escoffier
R1 Fork
C0 Furina
R5 Fav Sword
C0 Citlali
R5 TTDS
These are not the ideal option because these teams naturally don't use a Nightsoul character so you won't have the optimal team. The exception is Skirk when she can fit Citlali into her team but all the teams still require vertical investment to clear Dire comfortably.
Required DPS
Baseline DPS
Assuming a 120s timer, the raw baseline DPS requirement is:
- Fearless: 67,681 DPS
- Dire: 192,619 DPS
This is only a theoretical baseline. It does not account for shield downtime, movement, boss animations, rotation setup, or the fact that Stygian Onslaught starts characters at zero energy.
Actual DPS
The actual DPS check can roughly understood with this formula:
Actual DPS = Required damage / DPS window
Where:
- Actual required damage = Boss HP − damage gain during stunned phase - damage from backlash
- DPS window = 120s - time in shield phase
The -30% RES window makes your damage much stronger, so if you utilize this well then every team will have a slightly lower DPS requirement. The actual DPS requirement depends heavily on the number of Nightsoul characters in your team. If you have only 1 nightsoul character, then the required DPS is most likely way above the baseline while every additional nightsoul character will heavily decrease that number.