It's Turbin' Time (Library of Ruina Modded/Arknights)

All right, so this omake inspired me. Have a treat.

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The Eternal Persistence: Arknights Boss Profile

Capone, known as Capone, The Eternal Persistence in-game, is a boss enemy in Arknights. It is one of the main antagonists of Code/Distortion, where it also acts as the main boss.

Description

The Distorted form of the Siracusan mafioso known as Capone. Twisted beyond recognition by a mysterious voice. Sadness says: 'Begone, pass away!' But greed seeks eternity—seeks deep, deep eternity.

Drains 3 HP when entering the Objective Point; if this unit's HP is lower then 50%, enter Adaptation phase and alter route. During the Adaptation phase, gain 75% Physical and Arts evasion; when it is entered, use a global range special attack. During Adaptation, this unit will become unblockable and seek the remains of other units in order to consume them; if it finds another living enemy unit, it will instantly kill and consume them as well. Whenever this unit consumes units or remains, gain certain new Adaptations and heal extremely quickly. If this unit heals beyond 50% HP, it will leave the Adaptation phase and retain all Adaptations. Adaptations gained in a stage will be retained at all posterior stages. If this unit has a certain number of Adaptations, it will lose the capacity to enter the Adaptation Phase.

Statistics

HP: 20.000
ATK: 800
DEF: 200
RES: 30

Attack range: 1 tiles (Melee)
Attack interval: 2 sec.
Speed: 0.8 tiles/sec.
Weight: 5
Life Point penalty:3

Overview

"The Distortion of Capone. Seeks its own preservation above all, and as such, boasts powerful recovery abilities. When sufficiently damaged, it will seek biomass at all costs in order to repair its own injuries."

The Eternal Persistence occupies an area of 2x2 tiles.

The Eternal Persistence heals 1.5% of its health per second; this is disabled during the Adaptation phase.
When the Persistence consumes another enemy unit, it will begin healing 50% of its Max. HP over 10 seconds, and will gain Adaptations: depending on the stage, it possesses a different cap for Adaptations and the number of adaptations gained per phase. After the cap is reached, it cannot enter the Adaptation Phase.

In addition to this, the Eternal Persistence will inflict Maw with hits. When Maw reaches a certain threshold, the unit will take True damage. If a Maw-afflicted unit is retreated from this damage, it will not be redeployable and will spawn a Maw-Zombie with its ATK, HP and DEF. A Maw-afflicted unit being retreated through other damage or other means does not trigger this.

Cap:
C/D-7: 3
C/D-8: 6
C/D-9: 9
C/D-EX-2: 12

Adaptations Per Phase:
C/D-7: 3
C/D-8: 3
C/D-9: 3
C/D-EX-2: 4

Adaptations

In C/D-EX-2, Capone will always start with no Adaptations and will pick 4 random from the list every time it adapts.

C/D-7:

• Hardened Skin: This unit gains 300 DEF.
• Flesh-Tendril-Wings: This unit is now aerial. It gains an additional attack type: slam into the nearest Operator, dealing great Physical damage and stunning them for 4 seconds. Weight is now 2.
• Acidic Cannon: This unit gains an additional attack type: attack twice with halved attack, inflicting Nervous Impairment and Necrosis with each hit. This attack is ranged, and has 3 tiles of range.

C/D-8:

• Acidic Venom Spewer: This unit gains an additional attack type. Attack once with 250% attack, inflicting Nervous Impairment and Necrosis with each hit. This attack can only be used against an unit damaging it, and will inflict Stun on E.P for 1 second.
• Acidic Mine: This unit will leave a trail of toxic mines behind it. Units that are deployed in a mine will detonate it, receiving massive Nervous Impairment and Necrosis damage.
• Tendril Artillery: this unit gains +80 ASPD. Ranged attacks now hit four times with 30% ATK.

C/D-9:

• Final Wings: This unit's Max. HP is reduced by 50%. Gain doubled Movement Speed, +50% ATK and regenerate all health upon killing a target.
• Flower of Agony: When the Eternal Persistence is defeated, deal massive Necrosis damage to all allied units in a 3x3 area around it and remove Maw from all allied units.
• Blossoming of Annihilation: If used in C/D-EX-2, it can only be used if Flower of Agony was selected. Several Pustula Flower-Maws are spawned around the battlefield. E.P cannot move or attack or be damaged while a Pustula Flower-Maw remains. Pustula Flower-Maws possess no defenses but inflict constant Arts damage to all nearby allied units. If a Pustula Flower-Maw spawns in a place where an unit (allies or enemy) should be, they will be instantly retreated/killed.

C/D-EX-2 is a special challenge state, as it is tradition.

In C/D-EX-1, the player would have to deal with a simultaneous assault from the first iteration of Capone (C/D-7) and the Rat King coming at you from two different sides of the board.

In C/D-EX-2, however, they start with no adaptations and will adapt up to three times, selecting completely random upgrades each time. In addition to this, several unique Adaptations can be selected in this stage only.

• Pained Maw Blossoms: Can only be used if Flower of Agony was selected. This unit will periodically stop and release a global range Arts attack.
• Secondary Maw: All normal melee attacks hit an additional time.
• Tertiary Maw: All normal melee attacks hit an additional time. Requires Secondary Maw.
• Infection Vector Center: Units damaged by this unit receive extra Maw. When an unit has Maw and are within 2 tiles of E.P, they will also now constantly receive Arts damage. If an unit is defeated by Maw, give some Maw to the nearest unit.
• Infection Vector Release Valve: Can only be used if IVC was selected. Maw damages twice as much. This unit gains a ranged attack (4 tiles) that inflicts quadruple Maw as a regular attack.
• Self-Destructive Worm Gestation Pustule: Whenever this unit is damaged, inflict Nervous Impairment to the one that damaged it.
• Flight Development: This unit has 20% Physical/Arts Evasion.
• Reprocessment Center: This unit will heal 20% of Max. HP when defeating another unit. Operator defeated by this unit cannot be returned to the battlefield.
• Absorption-Specialized Tissue: Heal 30% of any damage inflicted to this unit. Requires Hardened Skin.
• Acidic Cloud Smokestack: Produce an acid cloud in a 3x3 area with this unit as the center, inflicting Burn and Nervous Impairment on units inside it.
• Tendril Hyper-Regeneration: This unit now deals damage twice in all circumstances. Stacks multiplicatively with any other attacks or buffs. Can only be picked as the very last buff in the list.
• Ultimate Blossom: When this ability is selected, kill all units in a 4x4 field around it. This unit is stunned for 15 seconds after using this ability.

E.P is much like the Endspeaker. It is an enemy that will continually adapt and scale. Unlike the Endspeaker, it's not limited by what it eats. With every stage, the Distortion will become tougher. You might notice that True Damage and other Evasion-bypass measures such as simply tossing a massive amount of attacks or simply being lucky as all hell can cleave through its Adaptation defenses and end the stage early. This is entirely intentional.

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The All-Devouring Persistence

All-Devouring Persistence, known as Capone, The All-Devouring Persistence in-game, is a boss enemy in Arknights. It is one of the possible final bosses of Code/Distortion, in the extra stage C/D-EX-3. C/D-EX-3 is the most challenging stage in the game, and it will reward the player with a special piece of Furniture: the Turbulence Office Graffiti.

Furniture Detail

All-Devouring Persistence is an alternate timeline E.P that managed to find enough civilians to consume and managed to kill Gambino. However, a contradiction in its mindset was pointed out. Its maddened persuit of survival had sent the entire city to unite against it- spelling its doom. How was it, that, its very desire to survive was the thing that destroyed it? It cannot handle the contradiction. It cannot comprehend this idea, and its mind is crumbling.

But in its death throes, the All-Devouring Persistence is the most dangerous it could ever be.

Description

The Distorted form of the Siracusan mafioso known as Capone, now reaching critical mass. A Distortion dangerously close to disastrously collapsing on itself. The sky rends, and waves of hateful toxin sweep through the air. To preserve itself, it is willing to sacrifice anything and anyone. Yet, all this desperate effort has only led it closer to death, and it cannot handle the contradiction.

Possesses a vast number of devastating special attacks; does not move. Absurd amount of health. Heals all health every second. Attacks allies and enemies indiscriminately and can attack up to three targets at once, prioritizing targets closer to it. Possesses the lowest possible targeting priority.

After a certain period of time without killing enough allies, the All-Devouring Persistence will self-destruct and inflict a vast amount of damage to all allies and enemies on stage.

Statistics

HP: 999.999.999
ATK: 800
DEF: 0
RES: 0

Attack range: Global
Attack interval: 4 sec.
Speed: Immobile
Weight: Immobile
Life Point penalty: None

Overview

"The Distortion of Capone. Seeks its own preservation above all, but its own contradictions have led it to destroy itself. Attacks anything in sight and if it cannot consume a set amount of units in a span of time, it will self-destruct and die, inflicting colossal damage indiscriminately."

The All-Devouring Persistence occupies an area of 4x4 tiles. Much like Bishop Quintus and Big Sad Lock, its large size means that it will remain stationary throughout the operation, never moving towards a Protection Objective. In addition to boasting monumentally high HP, it heals all damage every second, making damaging it pointless. As such, it will only be targeted by units if there are no other valid targets.

The All-Devouring Persistence possesses a single normal attack in which it damages up to 3 units on field with physical damage, with enemies also being eligible for it. It will focus on whoever is closer to its range. It also has 7 special attacks, which will be used randomly. It will not repeat an attack until all five have been used, and all attacks can also target enemies. There is a 5-second unique special animation before any of these attacks is triggered. Whenever a unit would be killed or retreated by the All-Devouring Persistence, it is snagged by its tentacles and eaten instead. Eaten units have doubled Redeployment Time. Eating an unit will grant the All-Devouring Persistence +40% ATK for 20 seconds, stacking up to 10 times.

• The All-Devouring Persistence vomits a puddle of acid on the nearest unit, killing them instantly. Units killed by this attack do not count as valid eating targets and do not allow it to persist for longer.
• The All-Devouring Persistence launches a series of acid grenades, dealing AoE Necrosis damage to up to 6 different targets. Units killed by this attack do not count as valid eating targets and do not allow it to persist for longer.
• The All-Devouring Persistence slams its tentacles on the floor, dealing 1000 Physical damage to every unit on field.
• The All-Devouring Persistence screams, temporarily silencing all units until it attacks again. Allies cannot activate skills during this period, though skills already active will remain functional.
• The All-Devouring Persistence bites all entities that are within 2 tiles of it, dealing 120% of its ATK 3 times.
• The All-Devouring Persistence starts to sob, stunning itself for 5 seconds and receiving a -80% ATK debuff for 10 seconds. After the stun is over, it will hit all units on field 5 times. During this period, any ATK buffs it has active cannot expire.
• The All-Devouring Persistence's tentacles select the nearest unit and spray them with acid, creating a 3x3 puddle that deals Necrosis damage to all units that enter it. The sprayed unit will take 4.000 Arts damage. Units killed by this attack do not count as valid eating targets and do not allow it to persist for longer.

The All-Devouring Persistence is the only enemy that is included in the enemy counter; all other enemies are excluded and will continue to spawn as long as the Persistence is present. Because of this, the operation will only be cleared when the Persistence and any other remaining enemies are defeated: but as it releases a massive amount of damage to all units, ally or enemy, when dying, only defeating it is necessary.

To defeat the All-Devouring Persistence, it is necessary that the player deny it food: by blocking the routes that would lead to it gaining food. As A.D.P targets the closest units, blocking the routes that would lead to its food coming closer will also lead to the player's Operators being directly targeted. One must note that some of its most dangerous attacks do not count as eating units, and letting a few enemies pass when A.D.P begins an acidic attack windup can help ease the player's burden.

When A.D.P spawns, a clock will be generated. It starts at 1 minute and goes up by 5 seconds whenever it eats an enemy unit. Eating an ally will increase it by 20 seconds. When the clock goes to 0, A.D.P will begin a "thrashing" animation. During this animation, it will damage units near it and attempt to launch acid at them, but it's essentially already dead. As long as you don't let any enemies pass through the Objective Point during the animation, there should be no problem.

After the animation is done, it will die, exploding and inflicting 99.999 Necrosis, Arts and Physical damage to all units on field, enemy or allied. The stage will then end.