“Tell him that he can’t see us,” I told Carwyn.
“I thought you grew up in the Dark city,” Carwyn snapped. “How do you not have the faintest idea how Dark magic works? I could maybe persuade him he didn’t see us if we were running past him in the dark, but he’s looking right at us!”
“I know how Dark magic works,” I said, and took a deep breath. I turned my hand in the link I had made for us, to hold Carwyn’s hand. “I know secrets in the dark nobody ever told you, doppelganger. Tell him that he can’t see us.”
Carwyn looked ready to argue, but first he glanced at the boy.
“You,” the boy began, “aren’t you . . .?”
Carwyn sighed, closed his eyes, and rolled his neck, as if working out a kink. When his eyes opened, they were covered with darkness, as if under a film of oil.
“You can’t see us,” he murmured, and there was a thicker sound to his voice. It made me think of blood.
“Keep saying it,” I whispered.
“You can’t see us,” Carwyn murmured. I lifted my free hand and my rings blazed, bright enough to blind.
Something about the air changed. The boy’s expression changed too, blanking out.
“You can’t see us. You can’t see us,” Carwyn chanted. “Lucie, he really can’t see us!”
Dark magic affected thoughts and emotions, and Light magic affected the physical world, created energy, and made everything work. I could blind someone only for an instant; Carwyn could make someone believe him, against the evidence of their own eyes, only for a moment.
But working together, it was different. If you could trick the eyes and the mind both, everything was different.
My aunt and I had done it for years in secret. I did not like to think about what Aunt Leila would have done if she knew I had shared this knowledge with a doppelganger. I did not want to think about what he might do with it. We had to escape.
We shoved the boy, blind and stumbling, out through the bathroom door. He thought he was moving of his own volition. He would slow down the guards, and he would not remember us.
The bathroom window turned out to be real, but small and so high up that we’d have to stand on the top of a toilet to get out. And only one of us could possibly get out at a time.
We stood there for a minute, on the cracked white floor tiles. When I looked at Carwyn, he was looking away, neck bent and eyes fixed on the wall. He didn’t plead.
“Screw it,” I said, and tore the band of light off his wrist.
He grinned at me, danced one step back, and then made a running jump at the toilet, launching himself up off it with one foot and out the window with the force of a rocket. I hesitated for a second, cursing my own stupidity, as the strip of light in my hand grew thinner and thinner and then died out, leaving a trail of sparks across my palm.
From outside the window came Carwyn’s voice, sounding both reluctant and annoyed. “Lucie,” he grated, as if he had a particular grievance against my name, “come on.”
I clambered onto the toilet and out the window, banging my elbow on the window frame, clumsy with sheer surprise. It was a much bigger drop from the window than I had hoped, but there were no other choices, so I leaped feet first. Landing hard and off balance, I would have fallen onto elbows and knees if not for Carwyn grabbing my arm and holding me steady. Almost as soon as he grabbed me he was pulling at me, his voice fraying with impatience as he repeated, “Come on—come on!” and we both ran.
We ran past the guards’ cars in the street, so fast that my eyes were stinging and the car lights looked like blurred streaks of red and blue painted on the black night. We ran down dark alleyways and fiercely bright city streets and through a park where there were cool shadows and fireflies and where I had to stop, head hanging between my legs, and suck air in desperately. We ran so fast that my legs were aching to the bones and my rings were actual weights on my hands, dragging them down to the earth.
And then we were standing on the Brooklyn Bridge, wind dealing my face a series of night-cold slaps, the granite and limestone towers starkly white. For a moment I felt as if we could run back into the Dark: for a moment the bridge looked like a way home.
Beyond the towers and the glittering cable lines that hung from them, web-like, as though the whole bridge were a giant spider’s castle, were the walls of the Dark city. Every Dark city had a wall built around it, even ours, which was separated from the Light city by a river. The walls were built with Light magic, and they would boil the blood of whoever tried to get over them. I remembered hearing the faint crackle of the bright walls near my home in the Dark, like the leaves of deadly trees in the wind.
I scarcely ever ventured this close to the edge of the Light.
It was a night of firsts.