Back on Earth, reality hit Leo with the dull thud of a C-minus on his thermodynamics midterm. He stared at the red ink, but his mind wasn't on heat transfer coefficients or entropy. It was on supply chains.
The portable solar panels he'd brought to Astra were barely enough to keep his phone and drone alive. If he wanted to make a real difference—if he wanted to industrialize a medieval society—he needed juice. Real power. Amperage that could run motors, pumps, and tools.
Over the next few weeks, Leo lived a double life that blurred the lines of his sanity. By day, he was a distracted student nodding off in lectures about fluid dynamics, his notebook filled not with equations but with schematics for a primitive hydroelectric dam. By night, he was a smuggler of heavy electronics.
He calculated the precise load needed to run a small grid. He needed deep-cycle marine batteries—heavy, reliable lead-acid bricks that could store enough energy to last through the long Astra nights. He sourced a massive 3000W pure sine wave inverter from an online surplus store, along with spools of thick-gauge copper wire and industrial fuses.
Transporting them was a nightmare. The distortion didn't care about mass, but gravity certainly did.
Leo made trip after trip on his reinforced e-bike, his calves burning as he hauled batteries that weighed as much as a small child through the shimmer and down the grassy hill to Oakhaven. Each trip left him exhausted, covered in sweat and grease, his muscles screaming in protest. But every time he looked at the dark, torch-lit windows of the town, he found the strength for one more run.
He set up his base of operations in the "Old Manor" on the hill—a drafty, stone building that the town had gifted him. It was perfect. Secluded, sturdy, and defensible.
Inside the main hall, he built his masterpiece. He wired the batteries in a series-parallel configuration to create a 24-volt bank. He connected the inverter, double-checking every connection with a multimeter. Outside, he mounted four 300-watt solar panels on the roof, angling them perfectly to catch the twin suns of Astra.
It took him three days of grueling work. He stripped wires until his fingers were raw. He crimped connectors until his hand cramped. But finally, it was done.
Leo stood in the center of the dark hall. In his hand, he held a single, humble object: a standard household light bulb screw-mounted into a ceramic socket, wired to a switch on the wall.
He took a deep breath. "Let there be light," he whispered, feeling a strange mix of reverence and scientific curiosity.
He flipped the switch.
Click.
The filament glowed orange, then blazed into a steady, brilliant white.
The room, which had known only shadows for centuries, was suddenly illuminated. Dust motes danced in the clear, electric light. The stone walls, the wooden beams, the old fireplace—everything was revealed in crisp detail.
It wasn't magic. It was physics. It was electrons flowing through tungsten. But as Leo stared at that single bulb, brighter than a hundred candles, he knew he had just cast the most powerful spell in the history of Astra.
He had brought the sun indoors.
He set up his power plant on the roof of his new estate, bolting the monocrystalline panels into place with a grim determination. To the townsfolk watching from below, he was a high priest constructing an altar to the Sun God. They whispered prayers as he angled the glass sheets towards the sky.
The true miracle, however, happened in the tavern.
Leo wired the building himself, stringing copper cable along the wooden beams. He installed warm-toned LED bulbs in the iron sconces and, as his pièce de résistance, hooked up a small, highly efficient chest freezer behind the bar.
When he flipped the breaker, the tavern didn't just light up; it glowed. The steady, golden light banished the flickering shadows of tallow candles. The air, usually thick with smoke, remained clear.
And when the innkeeper pulled a frosted mug of ale from the "cold-box" in the dead of summer, the room went silent. A dwarf wept openly. The Town Elder, sitting in a corner, read a missive without squinting for the first time in twenty years.
The dwarves of Oakhaven respectfully dubbed the inverter the "Arcane Converter" and the heavy batteries the "Lightning Vessels." Leo didn't correct them. In a way, they were right.