“Their lives are nothing against the sweep of time,” Shaeva says. “I will not be here forever, Elias. You must learn to pass the ghosts through more swiftly. There are too many.” At my mulish expression, she sighs. “Tell me, what do you do when a ghost refuses to leave the Waiting Place until their loved ones die?”

“Ah . . . well . . .”

Shaeva groans, the look on her face reminding me of Helene’s expression when I didn’t show up to class on time.

“What about when you have hundreds of ghosts screaming to be heard all at once?” Shaeva says. “What do you do with a spirit who did horrific things in life but who feels no remorse? Do you know why there are so few ghosts from the Tribes? Do you know what will happen if you do not move the ghosts fast enough?”

“Now that you mention it,” I say, my curiosity piqued, “what will happen if—”

“If you do not pass the ghosts through, it will mean your failure as Soul Catcher and the end of the human world as you understand it. Hope to the skies that you never see that day.”

She sits down heavily, sinking her head into her hands, and after a moment, I drop beside her, my chest lurching unpleasantly at her distress. This is not like when the Centurions were angry with me. I didn’t bleeding care what they thought. But I want to do well for Shaeva. We have spent months together, she and I—carrying out the duties of Soul Catcher mostly, but also debating Martial military history, bickering good-naturedly about chores, and sharing notes on hunting and combat. I think of her as a wiser, much older sister. I don’t want to disappoint her.

“Let go of the human world, Elias. Until you do, you cannot draw upon the magic of the Waiting Place.”

“I windwalk all the time.” Shaeva has taught me the trick of speeding through the trees in the blink of an eye, though she is faster than I.

“Windwalking is physical magic, simple to master.” Shaeva sighs. “When you took your vow, the magic of the Waiting Place entered your blood. Mauth entered your blood.”

Mauth. I suppress a shudder. The name is still strange on my lips. I did not know that the magic even had a name when it first spoke to me through Shaeva, months ago, demanding my vow as Soul Catcher.

“Mauth is the source of all the world’s fey power, Elias. The jinn, the efrits, the ghuls. Even your friend Helene’s healing. He is the source of your power as Soul Catcher.”

He. As if the magic is alive.

“He will aid you in passing on the ghosts if you let him. Mauth’s true power is here”—the Soul Catcher gently taps my heart, then my temple— “and here. But until you forge a soul-deep bond with the magic, you cannot be a true Soul Catcher.”

“Easy for you to say. You’re jinn. The magic is part of you. It doesn’t come easily to me. Instead it yanks at me if I stray too far from the trees, like I’m a wayward hound. And if I touch Laia, bleeding hells—” The pain is excruciating enough that thinking of it makes me grimace.

See, traitor, how foolish it was to trust this mortal bit of flesh with the souls of the dead?

At the intrusion of her jinn kin, Shaeva slams a shock wave of magic into their grove that is so powerful even I feel it.

“Hundreds of ghosts wait to pass, and more come every day.” Sweat rolls down Shaeva’s temple, as if she’s fighting a battle I cannot see. “I am much disturbed.” She speaks softly and glances into the trees behind her. “I fear the Nightbringer works against us, stealthily and with malice. But I cannot fathom his plan, and it worries me.”

“Of course he works against us. He wants to set the trapped jinn free.”

“No. I sense a dark intent,” Shaeva says. “If harm should befall me before your training is complete . . .” She takes a deep breath and collects herself.

“I can do this, Shaeva,” I say to her. “I swear it to you. But I told Laia I’d help her tonight. Mamie might be dead. Laia might be dead. I don’t know, because I’m not there.”

Skies, how to explain it to her? She’s been away from humanity for so long that she can’t possibly understand. Does she comprehend love? On the days when she teases me about talking in my sleep, or tells strange, funny tales because she knows I ache for Laia, it seems as if she does. But now . . .

“Mamie Rila gave up her life for mine, and by some miracle she still lives,” I say. “Don’t make me welcome her here. Don’t make me welcome Laia.”

“Loving them will only hurt you,” Shaeva says. “In the end, they will fade. You will endure. Every time you bid farewell to yet another part of your old life, a piece of you will die.”

“You think I don’t know that?” Every moment stolen with Laia is the infuriating evidence of that fact. The few kisses we’ve had, cut short because of Mauth’s oppressive disapproval. The chasm opening between us as the truth of my vow sinks in. Every time I see her she seems further away, as if I peer at her through a spyglass.

“Fool boy.” Shaeva’s voice is soft with empathy. Her black eyes lose focus, and I feel the ward drop. “I will find the ghost and pass him on. Go. And do not be careless with your life. Full-grown jinn are nearly impossible to kill, except by other jinn. When you join with Mauth, you too will become resilient to attack, and time will cease to affect you. But until then, be wary. If you die again, I cannot bring you back. And”—she kicks at the ground self-consciously—“I’ve grown used to you.”