The castellan's quarters possessed no hearth. For Kaiser, who regulated his internal temperature by feeding excess thermal energy to the Void ember, the freezing ambient temperature of the bare granite room was irrelevant.
For nine-and-a-half-year-old Aric Warborn, stepping over the threshold was like walking into a meat locker.
Aric shivered immediately, his breath pluming in the stagnant air. He wrapped his arms around his padded training gambeson, his heavy leather boots clacking loudly against the stone floor.
He looked around the room. It was completely empty, save for a simple wooden bed frame in the corner. The mattress hadn't been slept on.
Kaiser closed the heavy oak door. He did not touch the wood; he pressed his palm against the iron handle, sealing the door with a perfectly fluid motion that generated zero acoustic noise.
He turned to face his younger brother.
Aric's heartbeat was a chaotic, thumping rhythm of anxiety and the biting cold.
"Take off your boots, Aric," Kaiser instructed smoothly.
Aric blinked, his teeth chattering slightly. "It's freezing in here. And Papa says a Vanguard never takes off his boots unless he's in bed."
"You are not the Vanguard," Kaiser replied, his voice a frictionless baritone that seemed to glide through the freezing air. "You are a boy standing in a room. The boots are an armor you do not need right now. Take them off."
Aric hesitated. His Warborn pride warred with the terrifying, absolute authority radiating from the blindfolded giant. The memory of hitting the invisible, immovable wall of Kaiser's palm the day before won the argument.
Aric sat down on the cold stone floor with a heavy, uncoordinated thud. He unbuckled the thick leather straps and pulled off the heavy iron-nailed boots, leaving himself in thick woolen socks. He stood back up.
"Walk to the far wall," Kaiser commanded.
Aric frowned, confused by the simplicity of the order. But he turned and walked across the twenty-foot span of the room.
Thump. Thump. Thump. Thump.
To a normal human, a boy walking in socks on a stone floor was relatively quiet. To Kaiser's absolute hearing, it was a deafening cascade of kinetic violence.
"Stop," Kaiser said.
Aric halted, his shoulders tensing defensively. "What? I just walked."
"You did not walk. You fell, and you used your skeletal structure to arrest your own momentum," Kaiser diagnosed coldly. He glided forward, crossing the room in three frictionless, completely silent strides. He stopped right beside his younger brother.
"You walk exactly as the Duke has trained you to fight," Kaiser explained, looking down at the boy through the thick black silk. "You plant your heel first. You strike the ground to establish dominance over it. You brace your knees to absorb the shockwave of your own mass."
"That's how you stay rooted," Aric argued defensively, echoing his father's lessons. "Papa says if you don't root, the Evokers will blow you over."
"The Duke is an anvil," Kaiser said softly. "An anvil survives the hammer by being denser than the blow. But an anvil cannot dodge. An anvil cannot slip the blade."
Kaiser slowly crouched down, dropping his center of gravity flawlessly until he was eye-level with Aric.
"You are not an anvil, little brother," Kaiser whispered. "You are flesh and bone. If you try to absorb every blow the world throws at you, you will shatter before you reach your twentieth winter."
Aric stared at the blindfold. The boy's heart rate hitched. For his entire life, the Duke had only ever told him to be harder, thicker, heavier. He was constantly scolded for falling, for breaking his shield, for bleeding.
Kaiser was the first person to look at him and tell him that it was okay to not be made of iron.
"Turn around," Kaiser instructed softly.
Aric slowly turned his back to his older brother.
"The Duke has placed a terrible tension in your shoulders," Kaiser murmured.
Kaiser raised his hands. He did not ignite the Void. He simply rested his massive, calloused palms lightly against Aric's shoulder blades.
Aric gasped. The sheer, freezing temperature of Kaiser's skin bled through the thick padding of the gambeson. But the touch was not aggressive. It was incredibly precise.
"You walk like you are bracing for a strike that hasn't fallen yet," Kaiser analyzed, his absolute awareness mapping the knotted, overdeveloped muscle in the nine-year-old's upper back. "You carry your center of gravity in your chest, leaning forward to meet the threat. It makes you heavy. It makes you loud."
Kaiser applied a microscopic fraction of pressure to the base of Aric's spine with his left hand, and a gentle backward pull to the boy's shoulders with his right.
"Drop your hips," Kaiser commanded.
Aric awkwardly bent his knees, lowering his stance.
"Unlock your jaw. Breathe out," Kaiser continued. "Let the weight of your chest fall into your pelvis. Let your legs bear the mass, not your spine."
Aric exhaled a long, shaky breath. As he did, Kaiser physically aligned him. He straightened the boy's posture, stripping away the defensive hunch the courtyard had hammered into him.
"Now," Kaiser said, his voice directly behind Aric's ear. "Do not step by pushing off your back foot. Un-weight your leading foot. Let gravity pull your leg forward, and roll your weight across the outer edge of your sole. Do not strike the heel."
Aric concentrated. His face scrunched up in intense focus. He tried to visualize the bizarre, inverted mechanics his brother was describing.
He lifted his right foot. He tried to glide it forward without pushing.
He placed it down.
Scuff.
It wasn't a heavy thump, but it was a clumsy, sliding friction. He wobbled, his unused stabilizing muscles struggling to maintain the alien posture. He caught himself, his Warborn temper instantly flaring.
"I can't do it!" Aric growled, spinning around to face Kaiser, his fists clenched. "It feels stupid! If I fight like this, they'll just push me over! I'm not a ghost like you!"
The silence in the castellan's room was heavy.
Kaiser remained in his crouch. He did not reprimand the boy for his outburst. He simply analyzed the kinetic frequency of Aric's frustration.
"I do not want you to be a ghost, Aric," Kaiser said, his voice dropping to a register of profound, localized gentleness. "I want you to be the Duke. I want you to be the Shield of the North."
Aric blinked, the anger stalling in his chest. "Then why are you trying to make me walk like a shadow?"
"Because a shield is only useful if it is facing the right direction," Kaiser explained smoothly. "If your enemies can hear you coming from three corridors away, they will never attack your front. They will flank you. If you learn to quiet your iron... you choose when the battle begins."
Kaiser stood up. The movement was a mesmerizing display of the very physics he was preaching. He simply unfolded upward, completely bypassing the kinetic effort of standing.
"I spent ten years in a pitch-black box to learn how to silence my heart," Kaiser said, looking down at his brother. "I shattered my own bones against a magical vacuum so that you would never have to."
Aric stared up at the towering, scarred young man. The sheer weight of Kaiser's sacrifice—a sacrifice Aric was only just beginning to comprehend—pressed down on the boy's conscience.
"You did it... for me?" Aric whispered, his voice cracking slightly.
"I did it because the North requires a monster," Kaiser replied coldly. "And I would rather be the monster in the dark than watch them turn you into one in the light."
He stepped past Aric, walking toward the heavy oak door.
"We are done for today," Kaiser announced. "Your muscles are conditioned for the anvil. It will take months to re-string the bow. You will return tomorrow at dawn."
Aric stood in the freezing room, his socked feet resting on the stone. His Warborn pride, which had been a sharp, defensive spike just twenty minutes ago, felt completely dismantled.
He looked at Kaiser's broad, hyper-dense back. He saw the indigo Void-scars tracking up the spine, disappearing beneath the fine charcoal wool of the surcoat.
"Kaiser?" Aric called out softly.
Kaiser stopped, his hand resting inches from the door handle.
"Does it hurt?" Aric asked, his gaze fixed on the scars. "When the Duke hits me with the iron sword, it leaves a bruise. But those... they look like frostbite."
Kaiser did not turn around. He did not need to. His absolute hearing could hear the genuine, hesitant empathy blooming in his younger brother's chest. The resentment was cracking. The connection was forming.
"The physical pain ceased to register six years ago, Aric," Kaiser answered, his tone completely devoid of self-pity. "The only thing that hurts the Great Silence... is the noise of those it cannot protect."
He opened the oak door smoothly.
"Go to the dining hall. The Duke will be expecting you to eat half a stag before your morning drills," Kaiser said.
Aric quickly gathered his heavy leather boots, tucking them under his arm. He didn't put them on. He walked to the door in his woolen socks.
As Aric passed his older brother, he paused. He looked up at the black silk blindfold, trying to find some trace of humanity beneath the terrifying, frictionless exterior.
"I'll try again tomorrow," Aric promised, his voice low, lacking its usual brashness. "I'll try not to strike the heel."
"I know you will," Kaiser replied softly.
Aric stepped out into the corridor. He didn't stomp. He walked with agonizingly slow, deliberate steps, actively trying to mute the sound of his own mass against the thick carpets.
Kaiser closed the castellan's door.
He stood alone in the bare stone room. The Void ember in his chest pulsed lazily.