Day four. Adaptability.

Selene had moved them out of Room 3-C for the first time.

They stood at the edge of a training hall on the annex’s lower level — a wide, flat space with reinforced walls and a formation grid built into the floor. The grid lines pulsed faintly, waiting for activation.

"Today’s trial tests how you handle the unexpected," Selene said. "The formation in this room will create changing conditions. Shifting terrain. Obstacles. Environmental pressure. Your job is to navigate from one side to the other. The path will change as you move. What works for the first ten meters may not work for the next ten."

She looked across the group.

"You will go in pairs. You are evaluated individually, but you will be in the same space at the same time. That means you also need to be aware of another person’s movement without it slowing you down."

She read the pairings from her screen.

"Blackthorn and Hong. Lin and Moonwhisper. Rook and Valis."

She paused.

"Voss. You go alone."

Kaelen’s expression did not change. If anything, he looked faintly satisfied.

— • —

Iris and Yuelan went first. Through the observation window, Ren watched the formation grid activate — the flat floor erupted into a shifting landscape of raised panels, sudden gaps, low walls that appeared and vanished, and brief bursts of wind that came from nowhere and disrupted balance. Iris moved through it with precise, calculated steps, adjusting her route every time the terrain changed. Yuelan moved faster, more aggressively, powering through obstacles where Iris stepped around them.

Both finished. Both looked satisfied in very different ways.

Lin Yueying and Lyra went next. Lin Yueying glided through the course with a calm efficiency that made it look like she had done this before. Lyra struggled more with the terrain shifts but adapted quickly each time, adjusting her footwork on the fly. Not elegant, but determined. She finished fifteen seconds behind Lin Yueying, breathing hard but upright.

Kaelen went alone. The formation seemed to push harder for him — Selene was clearly adjusting the difficulty. He moved through it with cold, controlled precision, treating each new obstacle like an insult he was too disciplined to acknowledge. He finished fast.

Then it was Ren and Cassian.

They stepped onto the grid together. Cassian cracked his neck once and looked at the formation floor with the easy familiarity of someone who had seen worse.

"You ever done one of these before?" he asked.

"No."

"Keep your weight low," Cassian said. "When the ground shifts, the first thing that goes is your center of balance. Low center, fast feet. Everything else is just reading the room."

He said it casually. No lecture. Just one practical person telling another practical person a useful thing.

Ren nodded. "Thanks."

The formation activated.

— • —

The floor came alive.

Panels rose and dropped in a wave. A low wall shot up two meters ahead. Wind hit them from the left. The ground tilted.

Ren dropped his center immediately — Cassian’s advice, applied without thinking. He shifted his weight to the balls of his feet and started moving.

The first section was chaos. The terrain changed every three seconds. Panels rose under his feet, gaps opened where solid ground had been, obstacles appeared and vanished with no pattern he could predict.

But that was the test. Not strength. Not speed. Just: can you handle something you didn’t see coming?

Ren moved through it the way he had moved through the Hollowroot Realm — reading the space, adjusting constantly, trusting his instincts when his eyes couldn’t keep up. The OPTIMIZE parameters kept his movements clean but imperfect, his reactions fast but not impossibly fast.

Beside him — not close, but in the same shifting space — Cassian moved differently.

Where Ren was careful, Cassian was direct. He didn’t dodge obstacles so much as decide which ones mattered and which ones he could simply power through. A wall rose in front of him — he vaulted it without slowing. The ground tilted — he shifted his stance and kept going. Wind hit him — he leaned into it and used the push.

It wasn’t elegant. It was effective.

’He’s done this,’ Ren thought as he dodged a rising panel. ’Not this exact test, but this kind of thing. Rough terrain. Unpredictable conditions. This is just a Tuesday for a frontier kid.’

Halfway through the course, the formation threw something neither of them expected. A section of the floor dropped entirely — a three-meter gap that opened directly in both their paths at the same time.

Cassian was mid-stride when it happened. He didn’t hesitate. He planted one foot on the edge, pushed hard, and launched himself across.

Ren saw the gap open, adjusted his angle, and jumped a half-second later. He cleared it cleanly — not with Cassian’s raw athleticism, but with timing precise enough that he landed steady on the other side.

They both hit the ground on the far edge at almost the same moment.

Cassian looked at him.

Ren looked at Cassian.

"...Not bad," Cassian said, slightly out of breath.

"You too," Ren said.

And that was it. No big moment. No dramatic handshake. Just two people who had handled the same problem at the same time and come out clean, and recognized each other for it.

They finished the rest of the course without speaking. They didn’t need to.

When they stepped off the grid, Cassian stretched his arms over his head and let out a long breath.

"That last section was mean," he said. "The wind shift into the double-panel rise? That’s not a test. That’s someone having fun at our expense."

Ren glanced at Selene, who was making notes with the same expressionless focus face she always had.

"I don’t think she knows what fun is," Ren said.

Cassian snorted. "Fair point."

— • —

Afterward, while the others compared results and Selene posted the Day 4 scores, Cassian dropped into the seat next to Ren in the observation area.

He didn’t ask permission. He just sat, the way someone sits next to a person they’ve decided is fine.

"So," he said. "Where’d you learn to move like that?"

"Like what?"

"Like someone who’s been in a place where the ground actually tries to kill you." Cassian tilted his head. "That wasn’t school training. I’ve seen school training. It looks cleaner and works worse."

Ren considered his answer.

"I went into a Secret Realm during the break," he said. "A small one. Beginner level. Things got a little rough."

That was the most honest thing he had told anyone in this class so far.

Cassian’s eyebrows rose. "You went into a realm? During the break? Alone?"

"Yeah."

Cassian stared at him for a second. Then a slow grin spread across his face.

"You’re insane," he said. It sounded like a compliment.

Ren also smiled. "Probably."

"My family runs Explorer Guild contracts on the frontier," Cassian said, leaning back. "I’ve been near realms since I was twelve. First time inside one, I was fifteen. My dad took me. I threw up in the first hour and nearly got eaten by something that looked like a rock with teeth."

He said it the way people talk about bad weather. Just a thing that happened.

"Rock with teeth?" Ren said.

"Stoneback Ambush Clam. Don’t ask."

"I’m asking."

"It’s a clam the size of a dog that buries itself in gravel and bites anything that steps on it. My dad laughed for ten minutes. I still have the scar." He pointed to his left ankle. "Right there. Want to see?" 𝒻𝘳ℯℯ𝑤ℯ𝒷𝘯ℴ𝓋ℯ𝘭.𝑐ℴ𝑚

"I’ll pass."

Cassian grinned again. "Your loss."

They sat there for a while after that. Not talking about anything important. Not performing for each other. Just sitting — two people who had both been inside places where the world tried to kill them, and who recognized in each other the particular calm of someone who had survived it.

It was the easiest conversation Ren had ever had.

In his last life, he had never really had a friend. Not the real kind. The foster-care kind, the roommate kind, the classmate-you-nod-at kind — sure. But never someone who just sat next to you and talked about a clam that bit them, and meant nothing by it except that they thought you were worth talking to.

He hadn’t expected it to feel like this.

Simple. Comfortable. Like a door he hadn’t known was closed had quietly opened on its own.

— • —

When they got up to leave, Cassian clapped him once on the shoulder. Light. Casual.

"Same time tomorrow?" he said.

"We don’t pick the schedule."

"Yeah, but I’m picking the seat."

He walked off with his hands in his pockets, whistling something tuneless.

Ren stood there for a moment, watching him go.

The ember in his chest was warm. Not stirring, not pulsing. Just warm. The steady kind, like a fire someone had decided to keep.

’So that’s what a friend feels like,’ he thought.

’Huh.’

He picked up his bag and headed for the door.

Day four was done. Three more to go.