But they’re going to teach me how to fly, he thought, as though arguing with someone who wasn’t there.

Master Rufus held up one large hand, fingers splayed, and said something under his breath. The metal of his wristband began to glow, as though it had turned white-hot. A moment later, with a loud creaking that sounded almost like a scream, the doors began to open.

Light poured out from between them, and the kids moved forward, gasping and exclaiming. Call overhead a lot of “Cool!” and “Awesome!”

A minute later, he had to grudgingly admit it was kind of awesome.

There was a vast entrance hall, bigger than any inside space Call could have ever imagined. It could have held three basketball courts and still have room left over. The floor was the same glittering mica he’d seen in the illusion back at the airplane hangar, but the walls were covered with flowstone, which made it look like thousands of melting candles had slicked the walls in dripped wax. Stalagmites rose up all along the edges of the room, and huge stalactites hung down, nearly touching one another in places. There was a river, a bright glowing blue like luminous sapphire, cutting through the room, flowing in through an archway in one wall and out through another, a carved rock bridge crossing it. Patterns were cut into the sides of the bridge, patterns Call didn’t recognize yet, but they reminded him of the markings on the dagger his dad had thrown to him.

Call hung back as all the apprentices from the Trial flooded in around him, forming a knot in the middle of the room. His leg felt stiff from the long bus ride and he knew he would be moving slower than ever. He hoped it wasn’t a long walk to where they were supposed to sleep.

The huge doors closed behind them with a crash that made Call jump. He spun around just in time to see a row of sharply pointed stalactites, one after another, drop from the roof and thud into the ground, effectively blocking off the doors.

Drew, behind Call, swallowed audibly. “But — how are we supposed to get back out?”

“We’re not,” Call said, happy to have an answer for this, at least. “We’re not ever supposed to get out.”

Drew edged away. Call supposed he couldn’t blame him, though he was getting a little tired of being treated like a freakazoid just for pointing out the obvious.

A hand took hold of his sleeve. “Come on.” It was Aaron.

Call turned and saw that Master Rufus and Tamara were already starting to move. Tamara had a swagger in her step that hadn’t been there before, under the watchful eyes of her parents. Muttering under his breath, Call followed the three of them through one of the archways and into the tunnels of the Magisterium.

Master Rufus held up one hand, and a flame appeared in his palm, flickering like a torch. It reminded Call of the fire resting on the water in the final test. He wondered what he should have done to really fail — to fail in a way that wouldn’t have meant his coming here.

They walked one by one through a narrow corridor that smelled faintly of sulfur. It spilled into another room, this one with a series of pools, one of which bubbled away muddily and another full of pale, eyeless fish that dispersed at the sound of the humans’ footfalls.

Call wanted to make a joke about how Chaos-ridden eyeless fish might be undetectable if they were servants of the Enemy of Death, because, well, no eyes, but he managed to creep himself out instead, imagining them spying on all the students.

Next they came upon a cavern with five doors set into its far wall. The first was made of iron; the second, copper; the third, bronze; the fourth, silver; and the last of gleaming gold. All of the doors reflected the fire in Master Rufus’s hand, making flames dance eerily in the mirror of their polished surfaces.

High above him, Call thought he saw the flash of something shining, something with a tail, something that moved quickly into the shadows and was gone.

Master Rufus didn’t lead them into the cavern and through any of the doors but kept them walking until they came to a big, round, high-ceilinged room with five arched passageways leading in as many different directions.

On the ceiling, Call spotted a group of lizards with gems on their backs, some seeming to burn with blue flames.

“Elementals,” Tamara gasped.

“This way,” Master Rufus said, the first words he’d spoken, his sonorous voice echoing in the empty space. Call wondered where all the other magicians were. Maybe it was later than he thought and they were asleep, but the emptiness of the rooms they’d passed through made it seem that they were all alone here, underground.

Finally, Master Rufus stopped in front of a large square door with a metal panel on the front where a door knocker would usually be. He raised his arm, and his wristband glowed again, this time a quick flash of light. Something clicked inside the door, and it swung open.

“Can we do that?” Aaron asked in an awed voice.

Master Rufus smiled down at him. “Yes, you certainly will be able to get into your own rooms with your wristbands, although you won’t be able to go everywhere. Come inside your room and see where you’re all going to spend the Iron Year of your apprenticeship.”

“Iron Year?” Call echoed, thinking of the doors.

Master Rufus went inside, sweeping his arm around what looked like a combination living room and study area. The cave walls were high and arced upward to a dome. From the center of the dome hung a huge coppery chandelier. It had a dozen curving arms, each carved with designs of flame, each holding a burning torch. On the stone floor were three desks grouped in a loose circle and two deep, plush sofas facing each other in front of a fireplace big enough to roast a cow in. Not just a cow, a pony. Call thought of Drew and hid a sideways smile.

“It’s amazing,” Tamara said, turning around to look at everything. For a moment, she seemed like a regular kid rather than a mage from some ancient mage family.

Veins of bright quartz and mica ran through the stone walls, and as the torchlight hit them, they became a pattern of five symbols like those over the entrance — a triangle, a circle, three wavy lines, an arrow pointing up, and a spiral.

“Fire, earth, water, air, and chaos,” said Aaron.

He must have been paying attention on the bus.

“Very good,” said Master Rufus.

“Why are they arranged like that?” Call asked, pointing.

“It makes the symbols into a quincunx. And now, these are for you.” He lifted three wristbands off a table that seemed carved out of a single piece of rock. They were wide leather bands with a strip of iron riveted into the cuffs and fastened with a buckle of the same metal.

Tamara picked hers up as though it were some kind of holy object. “Wow.”

“Are they magic?” asked Call, eyeing his skeptically.

“These wristbands mark your progression through the Magisterium. Providing that you pass your test at the end of the year, you’ll earn a different metal. Iron, then copper, bronze, silver, and finally gold. Once you complete your Gold Year, you will be considered no longer an apprentice but a journeyman mage, able to enter the Collegium. In answer to your question, Call, yes, these are magic. They’ve been made by a metal shaper and act as keys, allowing you access to classrooms in the tunnels. You will get additional metals and stones to attach to your cuff, signifying your achievements, so that by the time you graduate, it will be a reflection of your time here.”