He picked the rooftop because it was close and because nobody came up here.

Two streets over from the apartment, the building with the water tank on the south side that blocked the sightline from the commercial district ranking boards. He had mapped it weeks ago when he was thinking about surveillance routes.

The roof was flat and slightly gritty, and the city spread out in every direction below, eleven points of blue light still visible in the skyline where the remaining C-rank gates held.

He had told Mina he was going for a walk.

She had given him the look she used when she had decided not to push on something and said okay, be back before Leo goes to sleep.

Ten-forty. He had twenty minutes.

The street four stories below was a quiet residential block, most windows dark, the people still awake doing it privately. Three feet of empty air sat between the roof edge and nothing.

He stepped off.

...

The first step held for approximately one second.

The resistance beneath his foot felt like compressed ground without being identical to it, something like the moment before a surface rather than the surface itself. He came back to the roof in a single motion and stood at the edge again.

One second. Longer than the volcanic dungeon. The Storm Castle air-steps had been faster but covered more distance, each one a fraction of a second compounding into movement rather than pause. He had not been holding the step there. He had been pushing through it.

He’d been thinking about it wrong.

The air-step wasn’t a platform. It only worked when he moved through it and the moment he tried to stand still, it started to fail.

He stepped off again.

This time, he moved with the step rather than onto it. His foot found the contact point and carried him sideways, a half-step left at three feet below the roof edge.

He came back and it was the same amount of time but with cleaner motion.

He kept going.

...

Over the next fifteen minutes, he ran every variable he could identify.

The closer to a surface, the air-steps came more readily, the resistance arriving faster. At the edge with his feet near the roof surface, the first step was almost immediate. Direction didn’t matter but his commitment to where he planned to push towards did.

Doing it continuously was where he found his current limit. Two air-step back to back required more effort and stamina from him. Three was where he felt like weights were being placed on him with the air-step being only half as high.

He did not push to four because it wasn’t worth it. He came back to the roof and looked at the city.

Eleven blue lights.

The city looked quieter every time the number dropped.

...

The thing he kept coming back to was this: he did not know where the ceiling was.

Not for the air-step specifically. For all of it.

The distortion had been expanding since the first F-rank gate, and each capability had arrived with enough context that he could eventually understand what it was and how it worked. Fractured Blade. Consecutive chain. Attention scaling. Class emulation. Near-death threshold. True fan threshold.

The air-step had arrived without context.

No condition he could identify. No threshold was announced by the system. No observation had unlocked it. It had started happening in the volcanic dungeon when he needed it, and then in Storm Castle when he needed it more, and the distortion had provided it both times without notification.

He was not sure which of those was more concerning.

Until now, the distortion had changed how he moved. But now the air-step changed the world around him. And if the distortion could evolve without telling him, it’s possible it really had no limits.

He looked at his hands.

The uncertainty was there because he didn’t have enough information yet. He had stood outside the first F-rank gate with an iron sword and no understanding of what was inside. He had not known how to properly use the distortion, or that it could imitate classes back then. Or that it scaled with attention, or that it would eventually let him step through empty air.

Every useful thing the distortion gave him started as something strange. He only gained control of it by doing trial and error, which is why the air-step wasn’t anything different.

...

Ten fifty-eight.

He took one more step off the edge, not to test anything, just to feel it once more. His foot found the contact point at approximately two seconds, slower than earlier. Fatigue in the distortion output, possibly. Diminishing returns on sustained testing without recovery. He memorized both.

The city sat below him. Eleven lights. He had cleared twelve with Sera. The countdown would finish, and something else would begin, and whatever that was, it would require everything the distortion could produce and probably more.

He needed the model to be complete before that happened.

The fire stairs took him down to the street, and he walked the two blocks back. Mina’s kitchen window was still lit. Leo’s was dark.

"Good run?" Mina said from the kitchen.

"Yeah."

She handed him a glass of water without being asked. He drank it standing at the counter, and she went back to the coordination paperwork spread across the table, the workload from the office that had gotten heavier since the C-rank countdown started, and she did not ask what he had been doing or what he was going to do next because she already knew and had decided that knowing was enough.

He set the glass down.

"Good night."

She made a sound without looking up that meant she had heard him and was not concerned, and he should go do whatever he needed to do.

He went to his room, sat at his desk, and opened the notebook to a new page.

At the top, he wrote: Air-step.

Below that, in the ordered way, he tracked things:

First confirmed instance. Volcanic dungeon. Involuntary. Duration: half a second. Condition: near-loss state, high true fan count, distortion threshold expanding.

Second confirmed instance. Storm Castle. Involuntary. Duration: multiple steps, full sequence. Condition: same threshold, combat escalation, boss engagement.

Third confirmed instance. Tonight. Rooftop. Voluntary.

The word stopped him.

Voluntary.

He had not processed it fully at the moment, but sitting with it now, it was the most significant data point the evening had produced. The first two instances had been the distortion responding to need without conscious direction. Tonight, he had stepped off the edge deliberately and reached for the resistance, and it had arrived.

He could access it on purpose.

That changed the model significantly.

He kept writing, working through the variables he had tested and the hypotheses he had not ruled out, his handwriting getting smaller as the page filled the way it always did when he was moving faster than the pen.

...

Mina’s kitchen light went out around midnight.

The distortion was no longer the only thing evolving faster than his plan. He closed the notebook and opened the laptop instead, and the other folder.

He had three open: Air-step. C-rank. Hale.

One was becoming harder to predict.

One was running out.

One was eventually going to force a confrontation.

The Hale folder that was over two weeks old was the largest filled with names of people he had not met. Contracts pieced together from public filings and dungeon coordination disclosures. Photographs of buildings. A flowchart that had started as four boxes and had grown to forty.

Four of those boxes were circled.

GaleWing’s dungeon contract office, which routed half the city’s commercial clears through one approval pipeline and made the rest depend on it. The Hale family’s stake in the broadcast division, the part that decided which hunters got their footage syndicated and which were left to the streamers.

The recruitment side, the academies that fed GaleWing every promising hunter coming out of the awakening cycle. And the political relationships, the names in the coordination office, and the ranking authority who took Victor’s calls.

Hit one and Victor could protect the others. Hit all four and there would be no time for him to react.

For two weeks, the problem had stayed the same:

Move on them one at a time, Victor would notice halfway through and reinforce the others, and it would become a war fought in public before he was ready. Moving on all of them at once would take time.

One at a time gave Victor time to adapt.

All at once gave him no time at all.

He could feel the confrontation with Victor was getting closer. He could tell Victor was focused on the dungeons but that won’t last forever.

He read through the broadcast division notes for a while, then closed the folder.

Tonight, the air-step.

After the eleven dungeons, Hale.

He did not have to choose between them but chose the order.

He shut the laptop and sat with both projects laid out on the desk in front of him, the notebook on one side and the printouts on the other. The room was quiet. The city outside was quieter. Eleven dungeons were still glowing in the skyline, and somewhere across the city, Victor was already asleep or already not, depending on what Victor did at one in the morning.

He did not know what he was becoming.

He was going to find out the same way he found out everything.

One condition at a time.