The first chest of the day had a single horizontal mark and was heavier than any he had opened.
He went through the standard checks, slower now because the HUD's thermal layer had added a step. He read the floor ahead of the chest for cold signatures before approaching, scanned the latch housing for the brass fitting that meant fire, pressed the planks around the base for the flex tell. Everything clean. He cracked the lid and read the mark and opened it.
The contents were packed in sections, each wrapped separately, the packing dense enough that the chest's weight had mostly been the object itself. He unwrapped the first section. A curved plate, dark grey, with a texture that was neither metal nor composite but something between them, shaped to fit a human torso from collarbone to lower ribs. The inner surface had padding, deliberately moulded, and along both sides ran a series of connection ports: cylindrical sockets, two on each side at shoulder height, one larger socket in the centre of the chest.
He unwrapped the second section. The back plate, matching the front, the same ports mirrored, the same central socket. He held both pieces up and looked at how they would fit together. The shoulder ports on the front lined up with the vine arm's connection points on the right side and the hydraulic arm's on the left. The central socket faced outward from the chest, waiting for something that was not in this chest.
He looked at the central socket for a while. The chest was empty otherwise.
'There is a second part. Find it.'
He repacked the plates carefully in their cloth wrappings and laid them across the scooter's platform behind him. They were too large to fit in the storage slot. He tied them in place with a length of cord he cut from the slot's edge and mounted carefully, feeling how the added weight at the rear changed the balance. The scooter pulled back slightly. He compensated forward and rode.
The second chest appeared two hours later.
Also a single horizontal mark, also heavier than its size warranted. He ran the checks and opened it and found the core.
Cylindrical, roughly the diameter of his fist, thirty centimetres long, the casing a dark alloy with fine machined ridges running its length. It was warm when he picked it up, not body-warm, warmer than that, the warmth of something with its own internal state. He turned it slowly. At one end, a connection fitting that matched the central socket in the torso plates. At the other end, a pressure relief valve, small and precisely made. Along the side, a gauge window showing a liquid level behind dark glass.
He pressed his palm against the casing and held it. The warmth was even, not radiating from a single point, distributed throughout. Something was already active inside it. He set it carefully on the planks and looked at the two chest casings side by side.
Both chests were built differently from the standard design. Denser wood, tighter joinery, the hinges machined rather than forged. The ordinary chests had hinges he could have bent with the hydraulic arm. These hinges he was not certain he could have bent. He took a small flat tool from the scooter's edge and worked one set of hinges free from the better chest's lid, three matched pairs, each one a precise piece of work. He put them in the storage slot with the bolt and the wood fragment. Then he set both chest lids aside and carried the core and the torso plates to the nearest stable section.
He had several hours of assembly ahead.
The front plate went on first. He positioned it against his torso over the tracksuit and felt the shoulder ports align with the vine arm's connection points on the right. The right side clicked in with two firm presses, the port accepting the vine arm's shoulder fitting and locking. He felt the connection through the arm: a slight change in the vine arm's readiness, as if something had been closed that had been slightly open before.
The left side was harder.
The hydraulic arm's shoulder fitting needed to meet the left shoulder port, which meant rotating his left arm inward and pressing up and back simultaneously, a motion that required the shoulder to move through the range it had lost since the wound. He got perhaps seventy percent of the required angle before the wound stopped him. He held there, breathing, then tried using the hydraulic arm's own force to assist the motion, the arm pushing itself gently through the remaining degrees. It worked, partially. The port accepted the fitting but did not lock cleanly, a half-connection that held under light pressure but would not hold under load.
He sat back and considered the problem.
He extended the vine arm to its current range and had it grip the left shoulder port housing from the outside, stabilising it while he pushed again with the hydraulic arm. The combination worked. The fitting seated and locked with a sound that was the same as the right side's click and was satisfying in the specific way that a mechanical thing completing its intended connection was satisfying.
The back plate required reaching behind himself, which he did in sections, using both arms to guide each edge into position, the vine arm holding the right side while the hydraulic arm managed the left. He found the seam where front and back plate met along his sides and pressed them together, working around his torso systematically until every connection point had clicked. The plates were on. He could feel the change in his posture, the structure distributing its weight across his chest and back rather than hanging from his shoulders.
He picked up the core.
The central socket faced outward from his chest. He seated the core's connection end into it and turned it a quarter rotation clockwise, feeling the threads engage, continuing until it stopped. The pressure relief valve now pointed slightly upward. He checked the fit from every angle he could see. Secure.
He found the activation point in the base of the socket, a recessed press, and pushed it.
The heat arrived first. Not intense, not uncomfortable, a spreading warmth from the chest outward, the core's temperature transmitting through the plate and into the padding and then into him. Then the hiss, low and pressurised, the sound of the steam core reaching operating state. Then a smell: something mineral, slightly metallic, the smell of old machinery waking up.
The HUD display changed.
New data appeared in the left panel he had not been able to fill since he first put the helmet on: a pressure gauge, a temperature reading from the core, and two small indicators labelled with symbols he recognised from the vine arm and hydraulic arm. Both indicators were green. Both arms had shifted from their individual power cells to the steam core's supply. The cell indicators on the arms themselves, which he checked now, showed their levels unchanged. They were drawing from the core, not from the cells.
He extended the vine arm.
The vine reached further than it had. The same pressure on the node produced an extension that passed the railing post two metres away and continued to two and a half before the tip curved. He retracted and extended again. Consistent. The core was giving the vine arm more than the individual cell had. He tried a directed catch, wrist rotation and node press together, and the tip hooked the post cleanly at a distance he had not been able to manage before.
He closed the hydraulic arm's grip on a railing post at half his usual effort. The response was faster, the force arriving without the slight delay the individual cell had introduced. He released and gripped again. The precision had improved.
He tested both arms at once, extending the vine with the right hand while gripping with the left. Both responded. No degradation in either. The core supplied both without apparent strain.
He stood in the grey light of the bridge with the steam core warm against his chest and the vine extended to his right and the hydraulic arm gripping the post to his left and the HUD tracking all of it. He had been adding pieces since the chest that held the vine arm. Each one had been a specific answer to a specific problem. The vine arm for the fall. The hydraulic arm for the beam, for the arrow extraction. The helmet for the traps he would have missed.
Together they were something that had not existed when any single piece arrived.
'Not armour. A system.'
He stood there for a moment with both arms extended and did not move, which was not part of testing the system.
He retracted the vine and released the post and checked the core's pressure gauge. Still reading full. He did not know how long full would last. The bridge was not going to tell him.
He mounted the scooter, weight balanced now with the torso plates redistributing load across his core, and noted that the ride felt different, more stable, the vibration reaching him differently through the plate's structure. His ribs registered the difference. An improvement.
He made a wall mark at the chest locations, one for each find, and started the engine.
The bridge went on ahead. The suit went with him.