Ethan woke early the next morning with ideas already forming. The village blacksmith Ferren agreed to let him use the workshop after Sera explained that Ethan might help improve healing. Ferren greeted Ethan with a booming voice and a good natured laugh. His workshop was filled with tools that looked primitive yet many had runes carved into the metal shaping mana in subtle ways. Ethan examined them one by one learning how this world blended physical craft with magical reinforcement. Ferren showed him stones called focus cores that stored small amounts of mana and could direct it when engraved with specific symbols. Ethan saw at once that these could serve as power sources and resonant nodes for a scanning device.

He began by sketching a ring shaped frame from scrap wood and metal. He asked Ferren to carve channels along the inside to hold focus cores at equal spacing. Ferren worked fast shaping the metal with both hammer and mana infused force. When he was done Ethan placed the cores around the frame then connected them with conductive threads that behaved like enchanted wires. The threads pulsed faintly forming a circular pattern like a crude coil. Ethan explained to Ferren that the device would read mana flow from a body placed in the center. Ferren did not fully understand but he liked the idea of helping Sera treat the injured more safely.

Sera arrived as Ethan began testing the alignment of the cores. She watched quietly as he adjusted positions and recalibrated the distances. She said healing magic did not normally use tools like this. Ethan answered that tools allowed precision and safety. She asked how he knew the device would work. Ethan said he did not know yet but he knew why it should. Mana was energy. Energy could be mapped. If enough resonant points surrounded a subject they could read the shifts in the field like detecting ripples in a pond. Sera seemed unconvinced but curious.

Ethan placed his hand inside the frame and asked Sera to channel a small amount of mana. She complied and the cores reacted faintly their glow rising and falling with her output though in an uneven and primitive way. It was enough to confirm he was on the right track. The device picked up changes even if the resolution was terrible. With refinement it could become a true scanner.

He spent hours adjusting angles and testing responses with different mana intensities. Every improvement made the glow more stable. Sera noted that the device reacted more consistently than her senses did. Ethan said that was the point. Tools did not get tired tools did not lose focus tools did not guess. They read what was there.

By midday Sera brought a young boy who had fallen earlier and injured his leg. The boy’s mother wanted to check if the bone was damaged. Sera said her reading was unclear because the boy’s mana was weak from fear. Ethan asked to test the prototype. Sera hesitated but agreed once the mother gave permission.

The boy placed his leg inside the ring. Ethan asked Sera to channel a steady low mana flow through the frame while he observed the glow patterns. The cores brightened near the area above the shin while dimmer along the knee and foot. Ethan studied the shadows where the light warped inward. Those distortions suggested a displacement. He asked the boy if that spot hurt most and the boy confirmed. Sera looked shocked because she had sensed the injury in the wrong place earlier. She asked how the device knew. Ethan said it was reading mana interference the same way magnetic fields shifted around an object. He pointed to the distortion showing where tissue had been strained.

Sera asked if the device could reveal deeper injuries or curse residue. Ethan said with refinement yes. The key was building a stronger resonant array and improving detection accuracy. He explained that each focus core was like an antenna. More of them better aligned would yield clearer readings. Sera listened carefully realizing this tool could reduce healer mistakes dramatically. She touched the frame with a thoughtful expression. She said this device would change the entire profession if it worked on a larger scale.

Word spread quickly across the village. People came to watch Ethan work as he continued upgrades. Ferren adjusted metal frames to create smoother arcs. Sera helped control mana output for calibration tests. Even children became runners delivering small crystals and components. Ethan had never worked like this before a whole community contributing without knowing the science behind the invention yet believing in its promise.

By evening Ethan built a second frame larger and more stable. He placed more cores in an even pattern and used enchanted thread with higher conductivity. When Sera tested it the glow reacted cleanly revealing mana pathways with far sharper clarity than before. Ethan felt his chest tighten with pride. This was no longer a crude ring. It was the first real prototype of a mana scan instrument. A device this world had never imagined.

Sera asked Ethan if he intended to build more. Ethan said he wanted to create a complete version one that could map entire body flow and detect internal disruptions reliably. Sera said such a tool would make many healers reconsider everything they had been taught. Ethan said that was necessary. Healing should never rely on guessing.

Ferren clapped Ethan on the back almost knocking him over. He said Ethan had done more for the village in a day than some had done in years. Ethan laughed modestly but inside he felt something deeper. Purpose. Direction. A sense that his skills mattered here more than they ever had in his world.

Later that night as the workshop dimmed Ethan studied the glowing prototype. Its cores pulsed like a heartbeat. Its frame hummed with faint resonance. It was rough imperfect unstable in many ways. Yet it was a beginning. The first step toward a medical revolution. Ethan knew powerful groups would want such technology. Some to help others. Some to control others. The Healer Guild. The nobles. The royal families. The black markets. They would all act once they learned what he had built.

But for now in this quiet village surrounded by warm lantern light and drifting mana he allowed himself to feel something close to hope. This world had magic. He had engineering. And together they would change everything.

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