CORE!Error

## Backstory

CORE!Error is the mastermind in the event/story of UnderLockDown manipulating everyone around him in order to protect the Multiverse from Team Void. CORE!Error appears in the universe when Error Koalemos is blasted into the CORE in a Undertale Genocide Timeline by his former friend Zerror otherwise known as Error!Frisk. Koalemos consumed by the Void outstretches his hand revealing his Soul while being torn apart, but luckily, a slimy skeletal hand gives the glitched human a handshake holding his monster Soul resulting in them together into one being.

Erupting from the lava as they exit the CORE they see a grey human child with grey skin and black eyelids, but the fused being did not stay for long glitching out of the universe. Reappearing in another universe standing in a city he sees Sans, Papyrus, himself, and a pink human child. Unfortunately, Sans died protecting Gaster and Papyrus while Gaster is unconscious being carried in Papyrus' arms while is crying for the loss of his brother. Hatred flows in the being as the human is about to murder Gaster and Papyrus he teleports in front of them blocking the incoming projectile.

Papyrus looks up to see a being constantly glitching as he cannot see the being's appearance, but neither did the human. The being and the pink human battled however, no matter what the human tried using her illusions and attacks it did not affect the being in any way instead empowering him, so she decides to retreat. The glitched being extending his hand shoots out violet strings capturing the human teleporting them both out of the universe as Gaster and Papyrus survived the encounter.

The being who captured the human brings her to the Anti-Void studying her magical abilities and why his Soul reacts strongly to her. Eventually he realises that he is like her having similar Souls that empower them using negative emotions, so he glitched out of the Anti-Void leaving her there for now. The being in his travels explores the Multiverse seeing the different cultures of many AUs he could find which fascinates him. The being interacts with the variations learning new magic as phantoms start appearing out from his fused amalgamated Soul seeing many human faces from his past.

The being did not why or how he is seeing the humans he saw die back in the Underground, but during his discoveries he eventually meets the grey child once again naming themselves CORE. The being greets CORE like an old friend creating his image into the human he once met Krotos, but CORE instantly knew that he is not Krotos. CORE did not reveal this as they wonder if he would like to go back into Team Hope to protect the Multiverse as the being remembered from the memories of Krotos the malevolent forces in the Multiverse. The being wanted to continue to explore the Multiverse however, they won't be a Multiverse left if he leaves the position as AU protector. The being accepts joining CORE in the Omega Timeline as they plan how to protect the residents of the Multiverse.

## Profile

### Appearance

There are two appearances for CORE!Error. The first appearance is the image he has created for himself using a mixture of the powers of the Souls he infused with. CORE!Error looks like a human being with long dark brown hair and a skinny physique as his distinct features is his flaring sunset and violet eyes. CORE!Error wears an oversized charcoal coat with a pale white jumper as well as a white neck warmer covering his neck. This is the appearance CORE!Error wants his enemies to see him as to misguide them in a false sense of security of what he actually is.

CORE!Error's second appearance otherwise his true form as his appearance becomes deformed. CORE!Error has pale grey skin as his hair turns dark grey while his eyelids become black. Multiple texts of Error covers his black eyelids as they constantly change from black to white, but his coat and boots change into dark grey while his jumper and neck warmer becomes light grey. CORE!Error's skin melts as one straight cut is above his right eye as another long cut is below his left eye creating two markings upon his face. CORE!Error resembles a skeleton humanoid with a wide grin that never changes.

### Personality

CORE!Error has a serious demeanour, but can be friendly towards both his allies as well as his enemies. CORE!Error is fascinated with the Multiverse exploring every AU that he can find that is not ruined by Team Void, but he eventually joins Team Hope becoming the Last Protector of the Multiverse again per say. CORE!Error although friendly is manipulative using people's desires against them in order to help him protect the Multiverse from harm by offering promises that he cannot keep which creates suspicion and distrust for his allies. CORE!Error will do whatever is necessary to protect the Multiverse at all costs.

## Soul

CORE!Error has a glitching fused destabilised monster and human Soul. The human's Soul trait is Ignorance a fusion of all negative Soul traits combined into one making the being become slowly ignorant to who they are however, since it is fused with a monster Soul that weakness is no longer present.

## Abilities

**Immortality:** Since CORE!Error is an amalgamation he cannot die under normal circumstances. CORE!Error cannot die by physical attacks, aging, or being poisoned as the only way for him to die is his code has to be erased by a powerful entity (for example: Error404.) If someone intentionally tries to kill CORE!Error a text above or in front him will say 'No Effect.'

**Mental Attack Immunity:** CORE!Error possessing all Soul traits both negative and positive cannot be manipulated or afraid by his opponent's uses. Instead a text of 'No Effect.' will appear displaying no changes has happened to him. This means CORE!Error cannot be turned or corrupted by his opponent using him as puppet neither intimidated by mental attacks that are supposed to affect his mind.

**AU Lockdown:** CORE!Error can lockdown any alternative universe at will when he desires keeping outside forces from entering the universe he has locked down. CORE!Error has to be in the AU for the ability to work and will work for a short period of time when he leaves that universe before it is eventually unlocked by itself. CORE!Error has this ability due to him being the current owner of the Alternative Universe UnderLockDown.

**Greater AU Teleportation:** CORE!Error has the ability to teleport other beings using mist to a location he desired. The mist covers the being or multiple beings and depending on their alignment it will become lighter if they are morally good or darker for how many that person has killed. CORE!Error usually emits dim light when he arrives using that ability while grey smoke spreads around his area occasionally it can create short lightning bolts.

**The Nightmare Souls:** CORE!Error can use the Nightmare Souls to change his opponent's Soul into the colour he desired to use their negative emotions against them damaging them in the process for how long he wished. The Nightmare Souls can construct themselves whenever they like or called by CORE!Error as colourful smoke transforms into see-through phantoms as they are the former inheritors of the Nightmare Souls. The phantoms can also change their opponent's Soul to their individual negative Soul trait.

* **Phantom Amber:** The ghost of the first ~~forgotten~~ human that had fallen after Chara is also the inheritor of the Nightmare Soul Impatience. Phantom Amber had the Soul of Bravery before she was reincarnated inheriting the Soul of Impatience. Being a turquoise phantom Amber can use her martial art skills to physically harm her opponent as well as changing her opponent's Soul using the negative Soul trait Impatience to harm them. Amber can use the ability explosive wave a punch that explodes harming and burning her opponent.

* **Phantom Garnet:** The ghost of the second ~~forgotten~~ human that had fallen after Chara is the inheritor of the Nightmare Soul Vengeance. Phantom Garnet had the Soul of Justice before being reincarnated then having the Soul of Vengeance. A gold construct Garnet can use a see-through revolves firing transparent bullets towards his opponent. Garnet also can use martial arts, but to a less extent than Amber preferring to use his revolver as well as changing his opponent's Soul into gold harming whenever they feel the emotion Vengeance.

* **Phantom Emerald:** The third ~~forgotten~~ human that had fallen after Chara inherits the Nightmare Soul Irresolution. Phantom Emerald had the Soul of Kindness before her reincarnation as she now wields the Soul of Irresolution being a transparent marron ghost. Phantom Emerald uses her frying to block incoming projectiles whether magical or not and she can use healing fire magic to help others in need. Rarely Emerald changes her opponent's Soul using their feelings of irresolution against them as she only does this to protect herself or by complete accident. Phantom Emerald can also use Fire Healing Magic to heal whoever she wishes.

* **Phantom Aqua:** A silver transparent phantasm that was the fourth ~~forgotten~~ human after Chara gaining the Nightmare Soul Apathy. Before she has the Nightmare Soul she had the Soul of Patience a calm and caring individual before she was reincarnated gaining the Nightmare Soul. Phantom Aqua holds a transparent knife as she has little concern to who she hurts. Aqua can change her opponent's Soul to the colour silver harming the being if apathetic thoughts cross their mind.

* **Phantom Sapphire:** Sapphire was the fifth ~~forgotten~~ human after Chara before she was reincarnated that came along with the Nightmare Soul Cruelty. Before she was reincarnated she had the Soul of Integrity, but now she is a lime transparent entity with malicious intent. Phantom Sapphire harms her opponent by using her skills in kick boxing however, she will hurt what her opponent holds dear. If the opponent has malicious thoughts that want inflict cruelty onto her she can change their Soul using those thoughts resulting in inflicting damage the longer they hold that thought.

* **Phantom Violet:** The second to last ~~forgotten~~ human after Chara that was reincarnated unknowingly having the Nightmare Soul Dishonesty, but before that she had the Soul of Perseverance. Now an indigo phantom Violet heavily uses the ability of violet strings capturing as well as shattering Soul particularly monsters in order to make them suffer. Phantom Violet can use the ability to change someone's Soul into the colour indigo and if they tell a lie they will suffer for it to her pleasure.

* **Phantom Krotos:** The Last ~~forgotten~~ human after Chara who has been erased from his own AU reappearing in the Anti-Void has the Soul of Ignorance. Krotos gives his Soul to Gaster as he possess Krotos' body now becoming nothing more than a echo. Krotos' appearance heavily changes becoming his version of Gaster with the lab coat as well as the formal trouser and shoes. Krotos with his skeletal humanoid body no longer has a smile on his skull, but instead is replaced by a frown. Phantom Krotos can summon magical mist arrows as well as the Determination Extractor or his and Gaster's version of the Gaster Blaster. Phantom Krotos can change his opponent's Soul into the colour of dark grey making them ignorant to their whereabouts or identity for a short period of time.

**Reverse Engineering Negative Souls:** CORE!Error with his monster Soul can reverse the Nightmare Souls traits reforming back to once it originally was before they were corrupted. He cannot do the same with the Soul of Ignorance since it was created first before the Soul of Wisdom, but he has access to every single Soul trait available except for the Soul of Wisdom. Using this ability he can modify the negative Soul trait abilities using both a mixture of a positive as well as negative emotions to create deceiving or devastating abilities.

**Fire Healing Magic:** CORE!Error can use fire magic to heal whoever he targets in order to help him or for his own benefit. Once the flame touches the target it will heal external injuries no matter what condition the target unless their Soul is destroyed. Both CORE!Error and Phantom Emerald are the only ones who can use that ability to heal allies or enemies of their choosing.

**Determination Extractor / Gaster Blaster:** CORE!Error can use the Determination Extractor as his Gaster Blaster either to drain beings with the Soul of Determination or to fire at his opponent banishing them to the Anti-Void if he chooses to otherwise he will inflict sever damage. Both CORE!Error and Krotos can use this ability while the rest of the phantoms cannot.

**Violet Strings:** CORE!Error can use the violet strings to either capture or shatter his opponent's Souls otherwise he will command them to his will forcing them to fight against their allies. CORE!Error as well as Phantom Violet can use this ability while the rest of the forgotten ghosts cannot even Phantom Krotos himself.

**Magical Arrows:** CORE!Error can construct multiple mist-like arrows as it is used to hinder an opponent or cancel an attack. The arrows are hard to see due to their misty appearance, but only CORE!Error and Phantom Krotos can use this ability. CORE!Error uses this ability only to cancel an attack while Phantom Krotos uses this to either hinder or harm his opponent.

**Hallucinations / Illusions:** CORE!Error uses Bête Noire's ability of fear and combining it with the Soul of Bravery instead of someone seeing their own worst nightmares CORE!Error can construct an image his opponent wants to see. CORE!Error creating an image of Krotos with darker tones makes his opponent confident and using that confidence he can create hallucinations making them see what CORE!Error wants them to see. CORE!Error can manipulate his opponent however he likes as long as they do not heavily doubt what they are seeing. He also uses this ability to make people see his mouth move with the words he speaks as he actually has an echoing voice.

**Telepathy**: CORE!Error uses telepathy to speak with people in a human voice rather than using his actual voice as it echoes. This makes CORE!Error mute for most of the story as he cannot communicate without giving away that he is an amalgamation.

**Explosive Wave:** CORE!Error can punch creating an explosion in front him to both harm and burn his opponents. Only CORE!Error and Phantom can use this technique to deal high damage to one or multiple opponents. The Explosive Wave is devastating up close as it could potentially kill a mortal in one hit despite how strong they are.

**AU Omniscient Surroundings:** CORE!Error has a similar ability to CORE with their omnipresence. CORE!Error can see anywhere and everywhere in the AU he is in having sight that does not require him to look at people or his opponents. CORE!Error can also look into a person experiencing their history knowing everything about them up until the present. This ability can also be used virtually seeing an image of the person will immediately experience that person's history and knowing who they are as CORE!Error uses this knowledge to manipulate both his allies and enemies.

**Special Ability; Complete Erasure:** CORE!Error's special ability is to make entities forget his actions during his time or another's in the Multiverse or make them unaware to specific alternative universes such as UnderLockDown. This ability can also make omniscient beings unaware of the incoming dangers that specifically targets them or/and their surroundings in the environment around them. This ability however, does not work on CORE entities.

**UnderLockDown:** Being the owner of UnderLockDown he must be in that universe in order to activate this ability. Once the ability is activated ginormous chains form around the crimson sky as no one can get in or out the universe under any circumstances. The only way for anyone to escape UnderLockDown is for the owner to decide whether he should release the Lockdown. If the owner is killed or erased from existence UnderLockDown stays permanent for eternity as no one can enter or exit that universe ever again.

If everyone no longer exists in UnderLockDown chains will form around the Multiverse onto each and every AU as no one can enter or exit the universes ever again. The code will remain the same no matter what state the AU is, but under one exception if a reset from UnderLockDown is activated it will reset the whole Multiverse into something new forcing residents from the Omega Timeline back into their AUs by the chains. Only CORE and Error entities will be excluded from this process instead being engulfed in grey mist as they change becoming older instead.

## Weaknesses

**Slow Movement:** CORE!Error can only walk as he cannot run or sprint, but he uses hallucinations and the phantoms to cover up his glaring vulnerability using their agility instead while they pretend to be CORE!Error.

**Echoing Voice:** CORE!Error has to breathe carefully in order for it to echo as lowly as possible trying not to alert his opponent that he is something else than what they see. He cannot communicate very well with it only using it to intimidate his opponent and nothing else otherwise it is a hindrance to him.