The shift from the sterile, hushed marble of the Sanctum to the raw, humid roar of the Bastion Jungle was almost violent. Grace and Caleb traveled in silence, the space between them occupied by a void by Mable’s departure. When the transit rail finally hissed to a halt at the edge of the sector, the air that hit them was thick with the scent of crushed fern, wet earth, and hot iron.

  The headquarters of the Stone Bastions was a a fortress carved into the side of a living mountain, swallowed by a jungle so dense the sunlight only reached the ground in shimmering, jagged needles. Massive stone walls, reinforced with pulsing blue veins of defensive Luma, rose through the canopy.

  "It’s huge," Caleb murmured, his voice sounding small against the distant, rhythmic thud of training hammers.

  At the main gates—two slabs of granite that looked heavy enough to crush a tank—a man stood waiting. He looked to be in his late thirties, wearing a simple, rugged vest of leather and plate. His face was tanned, mapped with faint white scars, but he wore a smile that felt genuinely warm, a sharp contrast to the cold, distant masks of the Archons.

  "Welcome to the Jungle," the man said, his voice a deep, comforting baritone. "I’m Commander Kael. I assume Sanctum was a bit... quiet for your tastes? Here, we prefer a bit of noise."

  He gestured for them to follow. "The Stone Bastions aren't about stopping a fight. We’re about ensuring the fight stops at us. You’re explorers, so I won't bore you with the manual. Just watch. If the stone calls to you, you’ll know."

  As they walked through the central training plaza—a massive hollowed-out cavern open to the sky—Grace drifted toward the weapon racks, her eyes distant, her movements mechanical. She was there, but her spirit was still back at the iron gates of the Sanctum.

  Caleb, however, stopped at the edge of a sparring ring.

  In the center, a squad of senior defenders was practicing a "Total Shield" drill. A hail of training projectiles—heavy wooden bolts launched from mechanical traps—whistled through the air. In the middle of the storm stood a single defender. He didn't have a weapon. He had a shield the size of a door and a stance that looked rooted into the very bedrock.

  With a rhythmic, guttural shout, the defender slammed his shield into the ground. A translucent blue dome erupted around him, catching the bolts with a series of sharp, percussive cracks. Behind him, two smaller recruits were crouched, safe and untouched.

  The sound triggered something in Caleb. The roar of the training bolts became the roar of the sky falling on Haven Heights.

  Suddenly, Caleb wasn't in the jungle. He was eleven years old, crouching in the ash. He remembered the weight of the debris on his legs, the terrifying heat, and his own hands—small, shaking, and utterly useless. He remembered Mable screaming for their parents, and he remembered himself—frozen, a researcher with no data to solve the problem of death.

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  Then, the memory shifted to Grace.

  She had been just as small as him. Her face had been streaked with soot and tears, her clothes torn. But while Caleb had been paralyzed by the logic of their defeat, Grace had stood up. She had picked up a jagged piece of wood, her knuckles white, and stepped in front of them. She had no power, no training. She had only the sheer, stubborn will to be a barrier between her friends and the end of the world.

  She was the shield before we ever knew what a Knight was, Caleb thought, his chest tightening.

  He looked at his hands now. They weren't as small, but they were still the hands of a boy who watched from the sidelines. He looked at Grace’s back—she looked so fragile without Mable beside her.

  He didn't just want to calculate the wind or map the terrain anymore. He wanted to be the one who stood beside Mable in the wards so she never had to fear a breach. He wanted to be the strength that stood beside Grace on the front lines, so she didn't have to be the only one standing up when the world broke.

  Mable’s words flashed in his mind, sparking a flame he hadn’t felt before. I won’t be the one who just watches again, Caleb decided, his jaw setting with a newfound, quiet iron. If she is the sword, I will be the stone.

  "Hey, don't look so grim, kid! The floor isn't going to swallow you. We already checked it for traps this morning."

  A heavy hand landed on Caleb’s shoulder, shaking him out of the flashback. A group of senior students, their armor scuffed and smelling of sweat and wood-smoke, gathered around them. They weren't like the cold initiates of the Sanctum or the arrogant nobles of the elite squads. They looked like older brothers and sisters, their eyes bright with a rough, communal humor.

  "First time seeing the Granite Dome?" a girl with a buzzed haircut asked, grinning at Caleb. She offered him a water skin. "Kael makes it look easy, but it’s all in the breathing. And the legs. Mostly the legs."

  "I'm Caleb," he said, taking a sip and feeling the cool water ground him.

  "I’m Jace. This is Jax and Miller," the girl said, gesturing to the others. "We saw your run in the Arena. Not bad for a couple of Heights kids. You’ve got the eyes for a Bastion. You look like you're already trying to figure out the structural integrity of the ceiling."

  Caleb Lumaged a small, genuine smile. "I was actually looking at the Luma-induction in the shield-rims."

  Jax laughed, a booming sound that echoed off the stone. "See? Someone who finally understands the weapon! We need more of those. Most of us just hit things until they stop moving. Come on, we're heading to the mess hall. The food here is amazing."

  They swarmed around Caleb and Grace, their rowdy, inclusive energy acting like a warm blanket. Grace allowed herself to be swept along, her smile flickering back into existence, though it was softer now, more tired.

  Caleb followed behind them, deep in thought. He looked up and caught a glimpse of Grace grinning at a joke Jax had made—it wasn't a full smile, but it was enough. It’s okay if we’re separated for a while, he thought, we can stand by each other in the future. At that, a calm, matching smile finally touched his lips.