The mental fragmentation technique was agony.
Not physical painâCaden had learned to endure that in Ironhaven. This was something deeper, more fundamental. Thorne's instruction required him to take pieces of himselfâmemories, emotions, core beliefsâand wall them off into separate compartments. Each barrier was a defense against compulsion, but creating them meant experiencing the trauma of self-division.
"The void uses your emotions as leverage," Thorne explained during their third session. "Fear, anger, desireâthese are the cracks it exploits. By isolating them, you deny it purchase."
Caden sat in the center of the runed circle, sweat pouring down his face despite the workshop's chill. He'd just finished compartmentalizing his memories of his mother's deathâlocking away the grief and rage that still burned when he thought of her.
"It feels like I'm becoming less human," he said.
"You're not. You're just organizing yourself differently. The emotions are still there. You can still access them when you choose. But they're no longer lying exposed for others to manipulate."
"Others being the void."
"Among others." Thorne's expression was guarded. "There are mages who specialize in mental magicâreading thoughts, implanting suggestions, controlling behavior. The Blackwoods employ several of them. Without defenses, you'd be vulnerable."
Caden absorbed this, adding it to the growing list of threats he needed to prepare for.
"I can feel the barriers now," he said, reaching inward. "They're like... doors in a hallway. Each one leads to a different part of myself."
"Good. That's exactly how it should feel. Now, the next step is creating the master lockâa central mechanism that controls all the barriers simultaneously. Without it, an enemy could break through the walls one by one. With it, they would need your conscious consent to access any part of your void magic."
"Show me."
---
The process took two more weeks.
During that time, Caden's other life continuedâmorning sword training with Marcus, classes during the day, quiet meetings with Sera in the afternoons. He told his friends what he could, which wasn't much. The mental barriers were working, but they also made it harder to share his inner experiences.
"You're different," Sera said one afternoon, her violet eyes searching his face. "Quieter. More controlled."
"Is that bad?"
"It's... concerning. When we first met, you were rawâemotions right on the surface. Now it's like looking at a statue. I know you're in there, but I can't quite reach you."
Caden struggled with how to respond. She wasn't wrong. The compartmentalization had created distance between himself and others, even those he cared about.
"I'm learning to protect myself," he said finally. "The techniques require... separation. Between what I feel and what I show."
"And you can't tell me more than that."
"Not yet. Not safely."
Sera was quiet for a moment. Then she reached across the table and took his hand.
"I trust you," she said. "Whatever you're doing, whatever you're becomingâI trust that you're still the same person who protected orphans in Ironhaven. Who threatened a monster with a chair leg."
"Sometimes I'm not sure I'm that person anymore."
"Then let me be sure for both of us." Her grip tightened. "The wall you're building around yourselfâmake sure there's a door. Make sure the people who love you can still get through."
Caden felt something shift in his chestânot the void, but something warmer. The barrier he'd built around his feelings for Sera trembled, wanting to dissolve.
He let it.
"There's a door," he said. "It's got your name on it."
Sera smiled, and for a moment, the weight of conspiracy and apocalypse seemed very far away.
---
The master lock was completed on a night when the stars aligned in configurations that made Thorne visibly nervous.
"These are the constellations that precede the Tithe," the professor explained. "The barrier between dimensions is thinning. You should be feeling the void more strongly."
Caden nodded. The hunger in his chest had indeed grown over the past weeksâa constant pressure that his barriers barely contained. Without the compartmentalization, he suspected it would have overwhelmed him by now.
"The lock is in place," he reported. "I can feel it holding everything together."
"Good. Now for the final test." Thorne's expression was serious. "I'm going to attempt to access your void magic using a compulsion technique. Don't resist consciouslyâlet the lock do its work. If I'm successful, we'll know the defenses failed. If not..."
"Then I'm protected."
"Then you're as protected as anyone can be against this kind of attack. Ready?"
Caden closed his eyes and let his conscious defenses relax, trusting in the mental architecture he'd built.
Thorne's presence touched his mindâa gentle probing at first, then more insistent. Caden felt the professor's magic slide along his barriers, searching for weaknesses, testing each compartment. The void stirred, responding to the external pressure, but the lock held firm.
Unable to find purchase.
After what felt like hoursâbut was probably only minutesâThorne withdrew.
"Remarkable," the professor said, and there was genuine wonder in his voice. "I couldn't find a way through. Even with my experience, even knowing exactly what I was looking for. Your defenses are... complete."
"Does that mean I'm safe?"
"It means the Blackwoods can't force you to use void magic. But they can still kill you. Still threaten the people you care about. Still try to manipulate you into choosing to open the locks yourself." Thorne sat heavily in his chair. "The defenses are a shield, not a solution. The real battle is still ahead."
Caden opened his eyes, feeling the weight of the master lock in his mindâa keystone holding everything together.
"Then I'd better make sure I'm ready for it."
"We'll continue training. Your control over the void itself still needs work. And there are techniquesâoffensive onesâthat could help if things turn violent."
"Teach me everything."
Thorne smiled, but it didn't reach his eyes. "That's what I'm afraid of. Every void mage who's learned everything eventually concluded they knew too much. The power becomes a burden, the knowledge a curse."
"Then I'll be the first to carry it without being crushed."
"Bold words."
"I've got bold friends." Caden rose, stretching muscles stiff from hours of meditation. "Marcus, Sera, Finn, Lyra, Damien. They're not just alliesâthey're anchors. Every time I train with you, every time I touch the void, I have their faces in my mind. Reminding me why I'm fighting."
Thorne was quiet for a moment. When he spoke, his voice was rough.
"My studentâthe one who fell during the Crimson Nightâshe had friends too. They weren't enough to save her."
"Maybe they weren't the right friends. Maybe she wasn't ready to let them help." Caden met the professor's eyes. "I'm not going to make that mistake."
"I pray you're right." Thorne rose, moving toward the door. "Get some sleep. Tomorrow we start on combat applications. It's going to get ugly."
Caden watched him go, feeling the weight of everything they'd discussed pressing down on him.
Then he went to find Sera, needing to remind himself what he was fighting for.