Ethan returned to Varnel’s ironworks the next morning carrying tools materials and the stabilizer packed inside a reinforced wooden crate. The workshop buzzed with early activity. Apprentices polished metal plates and arranged iron bars along the walls. Varnel stood near the furnace speaking loudly to his workers while the tired mage from yesterday rested on a stool with relief written all over his face.

When Varnel saw Ethan he waved him over. Good timing. I cleared a corner for you. If we are building something new we want everyone to see it.

Ethan nodded and followed him to the back of the workshop. The space was cramped but workable. He laid out his materials copper plates iron frames a dozen unstable crystals and various makeshift parts salvaged from broken tools. He began with the core frame bending iron rods into a circular structure. Apprentices gathered around whispering excitedly.

One apprentice asked What are you building exactly

Ethan answered without stopping his work. A conversion unit. It will take raw mana from the air then push it through a stabilizer then into a channel that outputs steady heat or light. It will power your furnace without burning a mage’s strength.

The apprentice blinked. You can do that

We already saw a small version yesterday Ethan said. Now we build one big enough for industry.

Varnel grinned and shouted You hear that This is history in the making

The mage looked uncertain. Ethan approached him gently. I am not replacing you. Your fire magic will still be necessary for special forging tasks. But you will not need to burn yourself out just for basic heat.

The mage lowered his gaze. Yesterday I almost collapsed. If this machine can help then I want to see it.

Ethan nodded and returned to the frame. He attached copper coils around the circular structure hammering them into place until they followed a tight clean loop. Every strike echoed through the workshop. The apprentices stopped their own work to watch.

Lira arrived quietly still wearing her blue mage robe. She approached Ethan and whispered The guild is not pleased. There are rumors that Master Halwen wants the council to restrict all non mage mana devices.

Ethan continued tightening the coil. That will not stop progress. They can push but people will pull back harder when they realize what stable energy means.

Lira hesitated. You are not wrong. But be careful.

He smiled slightly. I know.

By midday the core frame stood complete. Ethan installed the stabilizer at its center then connected it to two energy channels shaped from copper plates. These channels would carry stabilized mana toward two output ports.

One port for the furnace. One port for workshop lighting.

He double checked every connection. Every angle mattered. The wrong alignment would destabilize the flow or cause the crystal to overload. Sweat dripped down his face as he tightened the screws and hammered the final supports.

When he stepped back the workers stared at the machine with disbelief. It looked like a ring of metal wrapped around glowing coils with the stabilizer pulsing at its heart.

Varnel crossed his arms. That thing looks like it will explode.

It will not explode Ethan assured him. Probably.

Varnel stared. Probably

Ethan grinned. I was joking. It is stable. I tested the principles twice.

Lira rolled her eyes. Humans from other worlds have strange humor.

Ethan knelt and prepared to activate the unit. The workers gathered behind Varnel. The tired mage stood close his hands shaking slightly.

Ready Ethan asked

Ready Varnel said

Ethan pressed his palm against the stabilizer. Mana surged into the frame. The coils lit with blue light. The ring hummed like a living creature awakening from sleep. The light smoothed into a constant pulse.

He guided the first output port toward the furnace. The workers held their breath.

The furnace flared to life. Not with a burst. Not with the chaotic flash of fire magic. But with a stable controlled heat that filled the chamber evenly.

The mage gasped. It is perfect. This heat is ideal for shaping steel. Strong steady not too hot not too weak. I have never seen anything like it.

Varnel placed his hands near the furnace. His eyes widened. This is better than any mage. Steady as the rising sun. Ethan you mad genius you did it.

The apprentices cheered. The workers rushed forward to inspect the glow. Even Lira stepped closer her face lit by the calm blue flames.

Ethan activated the second port. Copper channels guided mana toward a line of lamps he had installed earlier. One by one they lit with a soft light. No flicker. No fade.

The entire workshop stood illuminated as if touched by a gentle dawn.

Varnel looked around in awe. For the first time I can see my entire shop at night. We could work after sunset. We could take more orders. We could grow.

That is the point Ethan said. Stable energy grows everything it touches.

Lira placed her hand near the unit. I can feel the mana flow. It is smooth as water. It does not disrupt the environment at all.

The tired mage spoke quietly. If this spreads mages will not suffer like we do now. We can focus on real magic instead of heating furnaces all day.

Ethan nodded. That is what I want. Mages should not be batteries.

But the celebration was short lived. A loud knock echoed through the workshop door. Varnel tensed. Workers stepped back. Lira’s expression darkened.

Ethan turned slowly as the door opened.

A nobleman entered wearing deep crimson clothing lined with gold. His guards followed close behind. His expression was cold sharp and entirely uninterested in the joy of the workshop.

Varnel whispered through clenched teeth. Lord Avelen.

Lira stiffened. He funds half the guild.

Avelen walked toward Ethan with heavy steps. So you are the outsider who plays with mana as if it were metal or rope.

Ethan remained calm. I am building infrastructure. Something your world has never had.

Avelen smirked. Infrastructure You mean tools that steal the work of mages and threaten industries older than your entire life

Ethan faced him without fear. I mean tools that let your city grow. Prosper. Expand.

Avelen stepped closer. I do not care about prosperity. I care about control. And you are creating something that shifts power away from the guild and the nobility. I cannot allow that.

Ethan felt the air tighten.

Lord Avelen said softly I will give you one chance. Dismantle this device. Stop building these machines. Leave the city quietly. If you do I will forget this insult.

Ethan looked around him. At the workers. At the mage who could barely stand yesterday. At Varnel who saw his future. At Lira who defied her own guild to help him.

No Ethan said

Avelen’s eyes flashed with cold anger. Then you have chosen conflict.

He turned sharply and left with his guards.

Lira swallowed hard. Ethan he will not stop. He has the power to turn the entire guild against you.

Ethan looked at the glowing furnace. At the bright lamps. At the machine that hummed like a beating heart.

Let him try Ethan said. I am not stopping either.