Chapter 611: Unexpected Path

Grey realized almost immediately that the fifth chain couldn’t work like the other four. It wasn’t enough for Prometheus to open and close logic gates that Grey had already designed.

The entire logic of those gates had to be capable of changing on the fly, while the number of active pathways increased, decreased, went dormant, or reappeared depending on what Prometheus needed. The chain had to be capable of growing and regressing, advancing and retreating, without Grey rebuilding the mech every time something new entered the equation.

That sounded simple enough until Grey actually tried to picture how it would work, since he could think of a dozen methods to make a chain physically expand and another dozen ways to add modular pieces that could be swapped in and out. But none of those solutions actually solved the problem, though, since they would only change the size or arrangement of the mech rather than what it fundamentally was on the inside.

Grey stood over the hovering blueprints with a vacant look in his eyes, fingers twitching every few seconds as one half-formed idea after another appeared and died before he bothered drawing it.

Slowly, his gaze drifted toward Veyrath’s bracelet again, his nice little portable oven, and this time the answer started taking shape before he could even fully articulate why.

Spirits could alter their Neural Frames far more freely than flesh-and-blood beings could, reshaping internal structures without ripping themselves apart in the process, largely due to the fact that their bodies lacked the same rigid physical framework to begin with.

What looked like a permanent pathway in a human could be little more than a temporary arrangement to an Elemental or Spirit, and Veyrath had already proven that a mech could house something like that without forcing it into a completely fixed form.

That was when Grey realized he had been treating Prometheus’ chain too much like his own. The other four chains needed rigid structures since they were supposed to represent Grey’s actual Linear, Resonant, Recursive, and Branching Frames as accurately as possible, which meant every pathway mattered if he ever wanted to use them as reference points for repairing himself.

Prometheus was different, and trying to force it into that same kind of fixed architecture would probably destroy the exact quality Grey wanted the Vessel to preserve.

So the fifth chain didn’t need permanent circuits at all, it needed the ability to create circuits whenever Prometheus wanted them.

’Liquid metals...’

The thought arrived so naturally that Grey almost laughed, since if he built each chain link hollow and filled the interior with a specially programmed liquid alloy, Prometheus could shape those internal pathways itself instead of relying on fixed circuits.

The outer chain would provide the stable Vessel and physical connection, while everything inside could shift from moment to moment, hardening into temporary logic gates and Neural pathways before melting apart again when Prometheus no longer needed them.

Grey’s grin widened as he started drawing, already imagining how the idea might function in practice. Prometheus could form a Linear structure inside one link, collapse it a second later, then rebuild that same space into part of a Branching network without anything physically changing on the outside, and if it gained an Ability that required a completely unfamiliar Neural architecture, Grey wouldn’t need to tear the chain apart and redesign the internals.

Prometheus could simply use the available space to form whatever circuitry the new Ability demanded.

"God, I’m a fucking genius."

The angel lady chose not to answer, though Grey barely noticed as he ran headfirst into the next problem.

A normal liquid metal wasn’t enough, since whatever filled those links had to remain fluid through extreme temperatures, changes in pressure, electrical surges, Neural Energy, Holy Energy, and whatever other nonsense Grey would eventually expose it to, while still becoming rigid the instant Prometheus wanted a specific structure.

It also needed to do all of that selectively, with one portion hardening into a circuit while everything around it remained fluid enough to shift into something else.

Living nanotechnology would have been perfect in theory, and Grey understood the broad principle well enough that he could probably stumble his way toward something eventually.

The problem was scale, since a true nanotech solution would require hundreds of thousands, maybe millions, of microscopic machines each operating independently, and Grey would run himself dry trying to program all of them long before he reached the fusion stage.

He didn’t need millions of tiny mechs if one adaptive substance could imitate the same behavior through its natural properties.

Instead of designing countless microscopic machines, Grey only needed one responsive substance inside each chain link, something that could reshape itself under Prometheus’ control and switch between fluid and rigid states as needed.

If that worked, every link could contain what amounted to an infinitely reusable blank circuit board, with Prometheus drawing whatever Neural architecture it needed directly into the material and erasing it again when the structure was no longer useful.

Ironically, that made the fifth chain mechanically simpler than the other four, since the links themselves only needed to be hollow and capable of containing the responsive substance. The real difficulty shifted entirely toward finding the correct material, and Grey immediately pulled up the raw-material database in his Cyber Space, eliminating anything too conductive, too brittle, too dependent on temperature, or too slow to change state.

Metals dominated his first several searches out of habit, but the longer he worked, the more certain he became that he was looking in the wrong category entirely.

He didn’t actually need metal.

What Grey needed was something that flowed naturally, responded quickly to external signals, could hold complicated shapes when necessary, and returned to a stable fluid state afterward without losing its properties.

Once he framed the problem that way, his thoughts drifted away from metals and toward organic resins, plant secretions, and materials that already behaved more like living tissue than machinery.

One particular category caught his attention.

Tree sap.

Not normal tree sap, obviously, but certain high-Class World Trees and Neural Flora produced sap that remained fluid indefinitely while reacting to energy like living tissue, carrying signals throughout their bodies before hardening wherever reinforcement was needed.

Some variants softened again once the stimulus disappeared, which meant the same material could repeatedly shift between fluid and structural states without destroying itself or requiring Grey to rebuild anything.

In a lot of ways... those tree sapts were precisely the Neural Frames of these plants.

Grey started reading more closely, and the match became increasingly ridiculous. Conductive when energized, insulating when dormant, capable of holding imprinted patterns, able to change viscosity depending on Neural input, and responsive enough that Prometheus could theoretically sculpt pathways through it faster than Grey could consciously follow.

If he blended the right sap with a small amount of metallic dust and a stabilizing resin, he could create something that behaved almost like artificial living tissue without needing to build even a single microscopic machine.

Prometheus would only need to push a signal through it, shaping temporary conductive pathways wherever it wanted before allowing them to dissolve back into the fluid mass.

And the best part? The "nanotechnology" was already built in. If he prepped right, he could maintain the living tissue of the substance. Meaning... the individual cells of the sap would become exactly the nanotechnology and signalling mechanism he needed.

Grey’s grin spread until his silver-bordered teeth showed. He had spent all this time searching for the perfect liquid metal, only to realize that the answer wasn’t metal at all.

"Yes," Grey murmured, already dragging the material into the fifth blueprint. "You are perfect. Fuck me I’m good."