The first week of Iron Realm was an exercise in controlled destruction.
Kael broke four doors.
Not on purpose. Iron Realm strength meant that actions he'd performed his entire life — opening doors, picking up cups, shaking hands — were now calibrated to a body that could bend reinforced hull plating. Every movement was too fast, too strong, too much.
Day one: he gripped a door handle and tore it clean off the frame. Sera stared at the handle in his hand, then at the door, then at him.
"I'll fix that," Kael said.
"You'd better."
Day two: he picked up a mug of water and crushed it. The mug. Not the water. Although the water went everywhere too.
Day three: he caught a falling book in the library and drove his finger through the cover. Grandmother Wen looked at the hole in the book, then at Kael, then at the hole again.
"That was a first edition."
"I'm so sorry—"
"You'll copy it. By hand. Twelve point font. No smudges."
He copied it. Iron Realm fine motor control was actually excellent once you stopped panicking about it. His handwriting had never been better.
The universe giveth, and the universe giveth in ways that require you to copy an entire book by hand.
Horen adjusted the training program.
"Your body is a weapon you've never used," he said. "The Dust Realm was a knife. Iron Realm is a sword. Same principle, different scale. But if you grip a sword the way you grip a knife, you'll cut yourself."
They started with movement. Basic locomotion — walking, running, changing direction. Things Kael had done since he was two years old, relearned from scratch because his muscles now operated at three to five times their previous output.
Running was the worst.
"Sprint to the far wall," Horen said. "Moderate speed."
Kael sprinted.
He hit the far wall.
Literally hit it. His Iron Realm legs launched him across the training bay so fast his brain couldn't process the deceleration, and he slammed into the reinforced wall hard enough to leave a dent.
"...ow."
"Moderate, I said."
"That was moderate!"
"Then your definition of moderate needs work." Horen's lips twitched. The old man was enjoying this. "Again. Slower."
Slower. Kael jogged to the far wall. Arrived in four seconds. Without hitting it.
"Better. Now: combat speed."
Kael launched. The world blurred. Wind resistance — actual wind resistance in an enclosed room — pressed against his face. He reached the wall in 0.8 seconds.
He did not hit it.
He stopped three centimeters from the surface, feet sliding, Essence braking through his channels.
"Good," Horen said. "Your reflexes are adapting. The Iron Realm rewires your nervous system to match your new physical capabilities, but the calibration takes time. A week, usually. Two for complex motor tasks."
A week of breaking everything I touch.
Mom's going to love that.
Combat training shifted from survival to technique.
At Dust Realm, Kael's fighting style had been simple: use Horen's basics, don't die, hope for the best. At Iron Realm, "the best" was a much higher bar.
"Your speed advantage over Dust Realm opponents is now absolute," Horen explained, demonstrating a three-strike combination that Kael's Iron Realm eyes could actually track for the first time. "No Dust Realm cultivator can match your reaction time. That's the good news."
"Bad news?"
"Every Iron Realm cultivator has the same advantage. Which means against your peers, speed is neutral. What matters is technique. The efficiency of your movement. The economy of your Essence expenditure. The intelligence of your targeting."
He demonstrated. A single punch — but broken down, it was a masterwork. Weight transfer from the heel through the hip. Shoulder rotation timed to the millisecond. Fist formation that concentrated force into a surface area the size of a coin. Essence channeled along the arm in a spiral pattern that added rotational force to the impact.
One punch. Twenty variables. All executed in less than a tenth of a second.
"That," Horen said, "is what separates a brawler from a fighter."
The Throne could copy that, Kael thought. It was already analyzing — he could feel it cataloguing Horen's technique, breaking it down into component parts, preparing to create a Hollow Echo.
He pushed the impulse down.
No. Learn it. Understand it. Make it mine.
"Show me again," he said.
Horen showed him. Twenty times. Fifty times. A hundred times.
By the end of the session, Kael's version was rough. Unpolished. About 60% of Horen's efficiency.
But it was his.
On the third day, he tested Phase Step in combat conditions.
Horen attacked — a controlled strike aimed at Kael's center mass. Kael activated Phase Step.
His body shifted. Not visibly — the displacement was dimensional, not spatial. For 0.3 seconds, he existed between — occupying the same space as Horen's fist but in a slightly offset layer of reality.
The fist passed through him.
Kael reformed behind Horen and launched a counter-strike.
Horen blocked it. Of course. The old man was a Storm Realm monster; a surprise counter from an Iron Realm novice was like a gentle breeze.
But his eyebrows rose.
"Where did you learn that?"
From a forty-thousand-year-old crystal shard I found in the engineering sub-levels.
"Self-taught."
"Mmm." Horen's "mmm" carried the weight of several unasked questions. "The technique is Essence-expensive for its duration. Point-three seconds of phasing costs you — what, 8% of your reserves?"
"About that."
"That's a luxury move. Use it sparingly. But..." He paused. Something shifted in his expression — surprise, maybe. Or recognition. "The dimensional displacement component. I've seen something similar. Once. In the Archon Court archives."
Don't ask. Please don't ask.
Horen didn't ask. He filed it away behind those kind, careful eyes and moved on.
"Again. This time, I won't be gentle."
He wasn't gentle.
Kael used Phase Step four more times during the session. Each use left him slightly drained, slightly dizzy, and significantly more confident.
The nausea was getting better.
The throwing-up-after-walking-through-walls situation had improved to merely feeling-like-you-want-to-throw-up-but-can-probably-hold-it.
Progress.