A bright blue worm hit Call in the side of the head, causing him to spill his airborne sand all over his lap. The worm bounced to the ground and lay there. Okay, it’s definitely a candy worm, Call thought, since it didn’t have any eyes and looked gelatinous.

On the other hand, that described a lot of things in the Magisterium.

“I can’t do this,” Aaron panted. He had his hands raised, sand spinning; his face was red with concentration. An orange worm bounced off his shoulder. Rufus had the bag open and was throwing handfuls of worms. “Gah!” Aaron said — the worms didn’t hurt, but they really were startling. There was a green one stuck in Tamara’s hair. She looked near tears.

The wall opened again. This time it was Alex Strike. He had a bag with him, and an odd, almost malicious grin split his face as he looked from Rufus, still hurling worms, to the apprentices, struggling as hard as they could to concentrate.

“Come in, Alex!” said Rufus cheerfully. “Leave the sandwiches just over there! Enjoy the music!”

Call wondered if Alex was remembering his own Iron Year. He hoped Alex wasn’t visiting any of the other apprentice groups, ones that were learning cool things with fire or levitation. If Jasper found out any details of what Call had to do today, he would never stop mocking him.

It doesn’t matter, Call told himself sternly. Concentrate on the sand.

Tamara and Aaron were moving grains, rolling them and pulling them through the air. Slower than before, but they were in the zone, working even when they were smacked in the back of the head with a gummi worm. Tamara now had a blue one tangled up in a braid and didn’t even seem to notice.

Call closed his eyes and focused his mind.

He felt the damp cold smack of a worm on his cheek, but this time, he didn’t let the sand fall. The music pounded in his ears, but he let all of that slide away. One grain after another at first, and then, as his confidence grew, more and more sand.

That’ll show Master Rufus, he thought.

Another hour went by before they took a break to eat their lunch. When they started up again, the mage bombarded them with waltzes. As his apprentices sorted sand, Rufus sat on a boulder and did a crossword. He didn’t seem bothered when they went hours over their time and missed dinner in the Refectory.

They tramped back to their rooms, tired and dirty, to discover food laid out for them on the table in the common room. Call found that he was in a surprisingly good mood, considering, and Aaron made him and Tamara crack up over dinner with his impression of Master Rufus waltzing with a worm.

The next morning, Master Rufus showed up at their door just after the alarm, carrying armbands that would distinguish their team during the first test. They all yelled in excitement. Tamara yelled because she was happy, Aaron yelled because he liked it when other people were happy, and Call yelled because he was sure they were going to die.

“Do you know what kind of test it’s going to be?” Tamara asked, eagerly winding the armband around her wrist. “Air, fire, earth, or water? Can you give us a hint? Like just a tiny little itty-bitty —”

Master Rufus looked sternly at her until she stopped talking. “No apprentices are given advance knowledge of how they are to be tested,” he said. “That would confer an unfair advantage. You must win on your own merits.”

“Win?” Call said, startled. It hadn’t occurred to him that Master Rufus was expecting them to win the test. Not after a whole month of sand. “We’re not going to win.” He was mostly concerned with whether they would survive.

“That’s the spirit.” Aaron hid a grin. He was already wearing his armband, just above his elbow. Somehow he managed to make it look cool. Call had tied his around his forearm and was fairly sure it looked like a bandage.

Master Rufus rolled his eyes. It worried Call that the corners of his mouth twitched up in an involuntary smile, as though he was actually starting to understand Master Rufus’s expressions and responding to them.

Maybe by the time they were in their Silver Year, Master Rufus would communicate complicated theories of magic by the lifting of a single bushy eyebrow.

“Come along,” the mage said. With a dramatic swoosh, he spun around and led them out the door and through what Call was starting to think of as the main corridor. Phosphorescent moss flashed and sparkled as they went, down a spiral stair that Call had never seen before, into a cavern.

At his other school, he’d always wanted to be allowed to play sports. At least here, they were giving him a chance. Now it was his job to keep up.

The cavern was the size of a stadium, with massive stalactites and stalagmites jutting up and down like teeth. Most of the other Iron Year apprentices were there with their Masters. Jasper was talking to Celia, gesturing wildly at the stalagmites in one corner, which had grown together in a complicated loop shape. Master Milagros hovered slightly above the ground, encouraging one of the kids to hover with her. Everyone was moving with restless energy. Drew looked especially on edge, whispering with Alex. Whatever Alex was saying, Drew didn’t look happy about it.

Walking farther into the room, Call glanced around, trying to anticipate what might happen. Along one wall was a large cave that appeared to have bars in front of it, like a cage made of calcite. Looking at it, Call worried that the test was going to be even scarier than he’d imagined. He rubbed his leg absently and wondered what his father would say.

This is the part where you die, probably.

Or maybe it was an opportunity to show Tamara and Aaron that he was worth sticking up for.

“Iron Year apprentices!” Master North said as a few more students trickled in after Master Rufus. “I give you your first exercise. You are going to fight elementals.”

Hushed gasps of dread and excitement spread around the room. Call’s spirits plunged. Were they kidding? None of the apprentices were prepared for that, he was willing to bet. He looked to Aaron and Tamara to see if they disagreed. They had both gone pale. Tamara was gripping her armband.

Call frantically tried to remember the lecture Master Rockmaple had given them two Fridays back, the one on elementals. Dispersing rogue elementals before they can cause harm is one of the important tasks mages are responsible for, he’d said. If they feel threatened, they can disperse back into their element. It takes them a lot of energy to coalesce again.

So all they had to do was scare the elementals. Great.

Master North furrowed his brow, as though he’d just noticed that the students looked concerned. “You’ll do fine,” he assured them.

This struck Call as unearned optimism. He imagined them all lying dead on the floor while wyverns bent on revenge swooped overhead, with Master Rufus shaking his head and saying, Maybe the apprentices will be better next year.

“Master Rufus,” Call hissed, trying to keep his voice down. “We can’t do this. We didn’t practice —”

“You know what you need to know,” said Rufus, cryptically. He turned to Tamara. “What do the elements want?”

Tamara swallowed. “Fire wants to burn,” she said. “Water wants to flow, air wants to rise, earth wants to bind, chaos wants to devour.”

Rufus clapped a hand down on her shoulder. “You three think about the Five Principles of Magic and about what I taught you, and you’ll do fine.” With that, he strode away to join the other mages on the far side of the room. They’d shaped the rocks into seats and were lounging there in apparent comfort. Some other mages were coming in behind them. There were a few other older students, too, along with Alex, the cave light glinting off their bracelets. That left the Iron Year apprentices in the middle of the room as the lights dimmed, until they were surrounded by darkness and silence. Slowly, the apprentice groups started to shuffle together into a single large mass, facing the portcullis as it opened up into the unknown.