- When a contractor's incuse is completed, they are dragged into the Abyss, which is a nightmarish plane of existence that looks like a cross between a broken toy box and hell , and where they get eaten alive by Chains or end up becoming one themselves.
- The Abyss is a dimension outside of time and space inhabited by bizarre, near universally hostile creatures called Chains that cannot be killed by conventional means. The only beings that can safely enter the Abyss are Chains and the Baskervilles.
- Even the weakest Chains are far stronger than humans, capable of casually overwhelming and killing just about any non-contractor they come across. Since they can't stay outside the Abyss on their own, they form contracts with humans by claiming if enough lives are sacrificed, history can be changed.
- If a person is somehow able to escape from the Abyss, that doesn't guarantee they'll be okay. Since the Abyss exists outside time, they could exit anywhere in the past or future.
- Sabier is now an Eldritch Location in its own right. The closer one gets to the hole, the more they are exposed to the Abyss' power. The people get lured in by echos of the past and become lost. Their bodies become warped by the power of the Abyss without turning into chains, being brought into a zombie-like state instead.
- The Cheshire Cat: While he isn't much of a front-line combatant, he is easily one of the more dangerous Chains. Unlike other Chains, who need a contractor to leave the Abyss, he can freely traverse between dimensions. If attacked, he can dissolve into a black mist to avoid harm. He can trap people in his pocket dimension where their own memories are used against them. Should the fight go bad, he can always flee with his dimension hopping abilities, collapsing his pocket dimension behind him, leaving those trapped to die in an empty void.
- Doldee: In most media, mind control can be fought off with a good I Know Youre In There Somewhere fight. Not here. Doldee gains more control the more the victim fights. Oh and her contractor isn't completely exempt from her influence.
- B-Rabbit: The most powerful chain in existence, the B-Rabbit has the power to destroy the world. Not by blowing it up, but by destroying what keeps the Abyss out. It wields a scythe and mentally controls a floating chain as weapons and its power reduces everything, even other chains, to dust.
- Humpty Dumpty: It can contract with multiple individuals at the same time, allowing it to prolong the contract, it manipulates its contractors' memories constantly, and it has a taste for cutting off heads.
- The unnamed chain in chapter 3 that takes on Sharon's appearance. When Oz notices something's wrong, it turns, showing several bulging eyeball portruding from Sharon's face.
The Will of the Abyss
- The Will is a massive Mood-Swinger, going from mad, to crying, all within a few minutes at the slightest provoction.
- Her alternate form is a limbless white rabbit doll in a dress with black, bleeding pits for eyes.
- She casually plucked out Break's left eye with her bare hands simply because she thought his eyes were pretty and she wanted them. She was going to take the other one as well, but got distracted.
- Oh, and she licked the blood off of it.
Children of Misfortune
- The aforementioned Lacie danced under raining 'blood' and often was Cute and Psycho. She stopped after growing up.
- Vincent still shows some of his childhood issues. As a kid, he had the habit of cutting things up with scissors (cats are NOT immune and as an adult he cuts dolls and people. All sweet and polite.
- Break is usually a sweet-craving Troll who appears and disappears out of freakin' nowhere. Unless you're his enemy or an Unwitting Pawn. If you're the latter, then he'll be as manipulative as possible to make his plans go well (and he'll even tell you that he's only using you). If you're the former, then he'll gladly fight you, torture you AND make some frightening expressions. His silly behavior's still around though.
- At in times of extreme distress he will scratch at his empty eye socket causing it to bleed. He's also going blind in his remaining eye.
- The entire family is under the command of a single individual who has the authority to order the deaths of everyone in an entire city, no questions asked. Oh, and each member commands a small Eldrich Abomination.
- Becoming Glen doesn't seem to be a happy fate. When you're "lucky" enough to live long enough without getting killed, you will still have to deal with your body deteriorating from the strain of having too much power of the Abyss in you. Once transferring Glen's soul to the next vessel is done with, you will gradually start dying a slow and painful death, and eventually turn into a chain. It's remarkable how Levi never stopped smiling throughout the ordeal, except for the occasional moments of shock.
- Then, there's also the chance that you will end up having a Child of Misfortune for a sibling, whom you will have to send into the Abyss to be killed Deader Than Dead.The Worse part is that everything about the Children of Misfortune were lies by the Jurors as they were a thereat to their plans being irregulars created by the cores basically all the Baskervilles were just tools for their stories and they were sacrificing innocent people for nothing.
- Even without that, you will end up distorting reality around you, especially the lives of those around you, and being Glen amplifies this. Just ask Leo. Or, well, any of the Glens, really.
- How about Oswald's plan? He wants to go back into the past and kill his OWN SISTER, someone he cares about dearly.
- Whenever Oz has Freak Out, things quickly become violent and disturbing.
- In Cheshire's dimension, Oz comes across the illusion of Alice's dead body, triggering Oz. Through unknown means (at the time), he begins to destroy the dimension. In a dazed state he declares that he will kill everything and everyone who makes Alice sad. When he hears Alice say that she's scared of herself, he decides that he would kill Alice without hesitation.
- This image of Oz being soaked in blood with the revelation of him being B-rabbit. It is incredibly disturbing.
- Oz was B-rabbit once upon a time, right? He must've been a complete psycho who enjoyed killing. Nope. The entire time Jack orders him to kill people, you can hear Oz shouting, "No, I don't want to kill people!" Then, when Jack runs into Alice, she gets completely stiff and asks him what he's done to Oz. She says, "Can't you hear Oz screaming through his tears?" Then you get this image: Sweet dreams.
- Jack's obsession with Lacie outright borders on psychotic, what with wanting to send the world Lacie loved into the Abyss just so she wouldn't have to be lonely in the Abyss anymore. Then, there's his treatment towards Oz...
- Normally yanderes visibly go nuts when their loved one is threatened. and the madness stays with them. Alternatively, sociopaths are extremely good at faking emotion and acting friendly but go a little deeper and they simply don't care . Jack is neither. He is completely, utterly rational and reasonable in his actions regarding Lacie even when they're obviously insane and he never shows anything other than a genuine smile even when he's planning something incredibly twisted. He is a Dogged Nice Guy taken to the extreme and gets creepier when you think about it. The fact that he creeps out a Baskerville should clue you in about how disturbing this guy is.
- Jack's fate after the Tragedy. Reduced to fragments of his soul desperately holding on to life, de-aging back to a baby and then returning to his former age without really knowing what was happening, several times. All the while never being completely sure that he would still exist after this cycle.
- The incident in Sablier that happened shortly after Leo became Elliot's servant. When your new and Only Friend gets stabbed by an Eldritch Abomination right in front of you and ends up being contracted to it to stay alive, you'd definitely wish it was all a nightmare.
- This panel of Lily after being shot in the head and surviving.
- This is the real me... ♥
- Also doubles as a twisted Crowning Moment of Funny. Vincent's face is priceless.
- The Tragedy of Sablier. It's a massacre, for Pete's sake! Said massacre happened to double as a Mercy Kill to save the people within Sablier from A Fate Worse Than Death, as Sablier starts to fall into the Abyss. Poor Oz is understandably disturbed ,even when he was still B-Rabbit.
- The part where Alice has a horrifying daydream about a bunch of hands dragging her down into the abyss was pretty horrifying in its own right. And why did no one mention poor Cheshire? Having your eyes cut out by a psycho boy with scissors is not a great way to die.
- This is more of a subtle one, but Reim tells Break that his chain has the ability to fake death, knocking the contractor out for a random period of time to complete the illusion. Also, Rufus Barma told him to keep this ability a secret from everyone in order for it to be truly effective. Now think about it. What could have happened if he'd been knocked out for a far longer period of time than he was...
- The Core of the Abyss reaching out to Alice, intending to take the Intention's other half to make her less lonely.
- What is it that Gil is cradling after he's regained all his memories? Oswald's head.