Night Hag decided to stay in her Breaker form and shirk her humanity as she reveled in her altered state. Although she formed a strong rapport with her shard, Night Hag stayed too long in her Breaker form and thus experienced a form of ego death. This loss of self gives her shard more of a say, similar to Khepri or Ash Beast; her shard takes advantage of this opportunity to rampage.
As she does not have to eat or sleep in her altered state, she could hunt fleeing prey for days or weeks. More often, she would control the area, cut off retreat, and then slowly break and maim her foe—she starts from the extremities and moves towards the vital functions last.
Night Hag is described as a dark-haired woman with skin as white as chalk. She wore a black dress that seemed to spread out and merge into the surrounding landscape. When Jouster cleared away the smoke in Hyde Park to reveal the Night Hag clones, everything within 15 feet of them appeared to be covered in a crumpled-looking black cloth.
She shattered into thousands of black shards when killed or destroyed. When she reformed from lingering infected material, it distorted and reconfigured itself into a new Night Hag.
Night Hag has an ordinary human form; however, she chooses never to go back to it.
Abilities and Powers
Night Hag is a Breaker who can control the landscape in a particular way. She can transmute the surrounding environment into a special material by 'infecting' it in her altered state. The longer she stays still, the more the infection will spread. However, the affected area would slowly regenerate after the fact. This form of location possession is also shallow; she is most effective with materials that stand above the ground's surface.
If Night Hag is destroyed or killed, she could reform herself from any lingering infected ground. That said, it is possible to kill her permanently.
As a consequence Breaker, she has no limit to the time she could spend in her altered state, except for the penalty to her human form that depends on the time spent in Breaker form. Night Hag is a Noctis cape as a secondary benefit of her altered state is not needing sleep or food. Although unused, she can return to her human form by drawing all 'infection' back into herself.
Presumably had a natural Breaker trigger; she left behind her human form and never looked back.
At the end of June 2011, the Slaughterhouse Nine attacked Toybox and appropriated their technology. Shortly after, Night Hag entered cryogenic sleep with most of the Nine. Despite being a living member of the Nine, Bonesaw still made clones of her.
↑ 1.01.11.21.31.4There were the consequence breakers. There was no limit to the time they could spend in the form, except for the penalty waiting at the end, heavy on their mind. It could be tied to any of the other drawbacks. Things like pain, of a magnitude and duration related to how long or how much power was expended while breaker, or madness, or having one’s mortal body age at a hundred times the rate while in the breaker state. Vista had just mentioned a breaker she’d been friends with, a magenta cat, that had missed her opportunity to turn human too many times, and had decided to stay in the form rather than face the consequences waiting for her.
Night Hag had been a Slaughterhouse Nine member once upon a time. She had also made that choice, but more to shirk her humanity, to revel in her altered state.
If my enemy here was a consequence breaker, then there was nothing I could do except play an extended game of chicken, seeing if she would give up out of fear the consequences had grown too heavy. - Blinding 11.11
↑ 2.02.12.22.32.42.5Night Hag transmuted her environment into a special material by 'infecting' it. The longer she stayed still, the more the infection spread. The affected area would slowly regenerate after the fact. If she was destroyed or killed, she could reform herself from any lingering infected ground. A breaker who decided never to go back to her usual form, she formed a strong rapport with her passenger. With her secondary benefits of not needing sleep or food, she could hunt prey for days or weeks as they tried to flee. More often, she would control the area, cut off retreat and then slowly break and maim her foe, starting from the extremities and moving towards the vital functions last. - Comment by Wildbow on Reddit
↑ 3.03.1Many breakers can go permanent breaker. Shadow Stalker, for example, doesn't have any strict forces in play that forces her to conserve the breaker state or balance her living & breaker state.
But it's still bad times for those who go that route, because they're forced to or because they prefer life in the breaker state to their ordinary life. Breakers have a closer connection to their passenger than any cape, and in the course of diving deeper into their breaker state and not, for lack of a better phrasing, surfacing for air, they begin to lose themselves and the shard gets more of a say. This is, very obviously, not a good thing. We see this sort of mentality in Khepri, and we can assume something like it in Night Hag. [...] The breaker document includes some examples (the Atropos breaker, the consequences for death breakers in general) of ways the passenger might seep in or that life might suddenly get harder, when one lapses fully into a breaker state.
So just wanted to point out that this is a thing that happens - and ego death often goes hand in hand with it. By the flip side of that same coin, to finally get around to answering your question - ego death, momentary, partial, or permanent, would destroy the Self and insert more Breakerness into the void that's left behind.
Most of the time they rampage - Ash Beast and Night Hag and the like. But if the shard isn't equipped to take advantage of the opportunity (Cauldron shards, Eden shards in general), maybe the self comes back and you get a Grumman. - Wildbow on Reddit, archived on Spacebattles
↑The Night hags, by contrast, were women, dark haired, dressed in black, with skin as white as chalk. Their dresses seemed to bleed into the surrounding landscape, so that everything within fifteen feet of them was covered in that crumpled-looking black cloth. - Sting 26.5
↑ 5.05.1The women practically disintegrated as the bullets, flames and other projectiles made contact. Their bodies shattered into thousands of black shards.
Moments later, they emerged from the landscape. One park bench distorted and reconfigured into a new Night Hag. That Night Hag was summarily slain, and reformed herself out of a nearby patch of grass. - Sting 26.5
↑Location possession, in a way, but it was shallow. She was most effective with materials that stood above the ground’s surface. - Sting 26.5
↑ 7.07.1It was Contessa, accompanied by the Number Man. Both held guns.
She shot one of the afflicted, then walked past the other, ignoring him. She opened fire in the fog. One clip, each shot aimed and measured, fired with a peculiar rhythm. One, then two in rapid succession, one, then two in rapid succession. She reloaded with an almost casual ease, then slid the gun into its holster.
The Number Man had her back. He fired into the darkness three times.
It took two minutes for the smoke to clear.
Two Nyx dead. Three Psychosomas. Four Night Hags. - Sting 26.5
↑<Ridtom> But it also can't be moved by her power, yet she [Cinereal] can somehow cover herself with it? <Ridtom> And also somehow draw the matter into herself in order to deactivate her Breaker power? * ThalAI has quit (Quit: Connection closed for inactivity) <Wildbow> Divebomb a location, spread ash in radius around impact site, bury foes, operate within radius of ash to rinse/repeat. <Ridtom> Ah, I was overthinking it. But still, her being unable to move the ash, but still being able to draw it into herself? <Ridtom> Isn't that kind of contradictory? <Wildbow> More a night hag thing. - Conversation with Wildbow on IRC, archived on Spacebattles
↑ 9.09.1The individual cases opened, and slowly but surely, the members of the current Slaughterhouse Nine stepped out. Jack, Hookwolf, Skinslip, Night Hag. - Interlude 25
↑“Yes,” she said. “And they struck one target after Boston. Toybox.” [...] “The Slaughterhouse Nine attacked them at the end of June,” Miss Militia said. “In doing so, they appropriated all of the tinker technology and all of the tinkers that were staying with the group. See page thirty-six and on.” [...] “The Slaughterhouse Nine attacked Toybox, taking the group’s devices for themselves, and they disappeared. We suspect they used Dodge’s devices to exit into a pocket dimension, and by the time we’d found a way to follow, they’d exited elsewhere.” - Cell 22.2
↑I stared at the laptop. It was still on the last page. Glace.
“Cryogenics,” I said.
“Stasis,” Miss Militia agreed. “The pressure grew too intense, with Defiant and Dragon’s pursuit, they weren’t recovering from losses fast enough. They’ve gone into hiding, and we think they plan to wait.”
Wait, I thought.
“How long?” Clockblocker asked.
“We can’t know for sure,” Miss Militia replied. “But if they’ve put themselves in a cryogenic sleep, they could wake and resume their normal activities days, weeks, months or years from now. Depending on the resources they have available, they might well emerge with clones of their current members at their side.” - Cell 22.2
↑“She’s covering the area with her smoke,” I spoke, over the channel. “You need to clear it.”
“On it. Cover your eyes!” Jouster hollered. [...] And in the midst of the crowd, there were the enemies, simply standing and observing. Nyxes, Psychosomas and Night Hags. - Sting 26.5