Ethan spent three days mapping what he'd broken.
The stromatolite colony sprawled across twelve square kilometers now, its bacterial layers forming patterns that shouldn't exist. Fractal geometries. Mineralization sequences that required specific chemical gradients, appearing in perfect arrangement. The kind of optimization that natural selection achieved through countless failed experiments, compressed into a single accidental intervention.
He'd made a garden where there should have been wilderness.
The Engine pulsed steadily beneath his hands, its warmth unchanged. No punishment, no correction. Just the quiet hum of a machine waiting for instructions it hadn't asked for.
"Show me what it cost," Ethan said.
The darkness at the center contracted. Then expanded.
Time's passage appeared as layers now, visible somehow in the obsidian surface. He could see the three hundred years he'd spent. Not stolen from Aethon—the world had lived them fully. But pulled from somewhere. Some reservoir he didn't understand.
His hands trembled.
Not the ALS. Not yet. But when he checked his phone's calendar, the date was wrong.
Three hours had passed in his apartment.
Three hundred years on Aethon. Three hours here. The ratio wasn't fixed. It bent under the weight of his attention, stretched thinner when he pushed.
Ethan pulled up the video feed from his building's hallway camera—a habit from his early MIT days, when he'd wanted to track his own routines. The timestamp confirmed it. Three hours lost while he'd created his perfect garden.
He looked at his coffee. Still warm.
Time didn't care about thermodynamics when you were playing god.
---
On Aethon, the stromatolites were dying.
Not the whole colony. Just the accelerated sections, the ones that had grown too fast. Their bacterial communities couldn't maintain the metabolic complexity their structures demanded. They were collapsing from the inside, leaving hollow mineral towers that erosion would claim within centuries.
Ethan watched through the Engine's surface, his hands careful now. Not touching. Just observing.
The natural stromatolites nearby continued their slow work, building layers millimeter by patient millimeter. They would outlast their forced cousins by eons.
"Fragility scales with intervention," he said to the empty apartment.
The Engine pulsed once. Agreement? Acknowledgment? He still couldn't read its language.
---
Maya called that evening.
"You sound tired," she said without preamble.
"Long day." Ethan glanced at the Engine, covered now with a black cloth. As if that would help.
"The symposium's in two weeks. You still planning to present?"
He'd forgotten. The dark matter panel, his research on modified gravity theories. Work that mattered three days ago.
"I'll be there," he said.
"Liar." But her voice was gentle. "You haven't answered my last four emails about the paper draft."
"I've been working on something else."
"The family thing? Your grandfather's estate?"
Ethan looked at the covered Engine. Estate. As if you could inherit godhood through probate.
"Something like that."
Maya was quiet for a moment. Then: "Ethan, when you got the diagnosis... you said you wanted to spend whatever time you had left doing work that mattered. Real work, not busy-work."
"I remember."
"Is this real work?"
He thought about the stromatolites. The collapsed towers and the patient builders. The three hundred years he'd spent learning that creation required more than intelligence.
"Yes," he said.
After they hung up, he uncovered the Engine.
---
The fifth principle came not from watching, but from waiting.
Ethan spent the night seated before the Engine, hands in his lap, observing Aethon's slow midnight. The bacterial mats pulsed with faint bioluminescence—a trait that had evolved naturally, no intervention required. The ocean glowed in patches, a preview of the light-shows that would come when multicellular life emerged.
He felt the urge to touch. To guide. To optimize what random mutation was doing so slowly.
Instead, he stood. Made coffee. Returned.
The mats had spread during his absence. Not much. Just the natural expansion of successful organisms into available territory. No patterns. No perfection. Just the messy, resilient sprawl of life doing what life did.
It was beautiful precisely because he hadn't touched it.
Ethan picked up his notebook—actual paper, because screens felt wrong for this—and wrote:
*Principle Five: The best intervention is the one you don't make.*
His hand cramped on the last word. The tremor he'd been expecting, arriving right on schedule. The ALS saying hello, reminding him that time had limits even for observers.
He flexed his fingers, watching the muscle fasciculation. Three to five years, the neurologist had said. Maybe less. Maybe more, if he was lucky.
Time enough to watch a world evolve? Time enough to learn restraint?
Ethan looked at the Engine, then at Aethon's glowing seas.
"Let's find out," he said to the darkness.
The Engine pulsed once, steady as a heartbeat, and the bioluminescent mats continued their patient work beneath seas that had never known his name.