Although Piltover's reputation as the City of Progress is well-deserved, the rapid technological developments that this city-state has gone through have led to some unexpected results. Acen is one of those results.
Siron was a brilliant Piltovian techmaturgist and an expert on all things hextech. He was also a passionate but sadly misguided patriot who believed in the ultimate supremacy of Piltover. When he learned of the Zaunite creation of Zac and Blitzcrank, he was distraught. He vowed that he would create Piltover's answer.
Siron worked on his project for ten years. Slowly driven mad by his passion, he spent more and more time in his laboratory, increasingly unwilling to be away from his creation. Eventually, after the second year, he entered his lab and locked and barred the door. He had no human contact. His servant bought and prepared food, and passed it through a porthole in the door. During the day, he worked, while he ate, he tinkered, and while he slept, he dreamed of intricate mechanisms of gold and brass and silver.
It was a cold night in Piltover. Even from the confines of his lab, Siron could hear the rain pounding on the roof above, but he paid it no mind as he slotted one of the largest pieces of his creation, the brass chestplate, into place with a satisfying click. Siron stepped back and admired his creation. The tall figure, made of metals of all kinds, powered by techmaturgy that even Siron wasn't sure he understood. The hands, holding the massive rifle in their grip. And, in gleaming letters on the figure's back, the name. Autonomous Combat Entity. ACEN.
There was only one thing left to do. Siron walked over to his desk, and picked up a large cylinder. It was capped at both ends by bronze plates, and between them was glass. Whatever was inside emitted a blue light, so bright it hurt Siron to look at it. He had found it not long after he started his project. It had sat on his desk ever since. The cylinder contained ancient magic, magic that Siron was convinced that he understood. When he inserted it into the chest of his creation, it became clear that he did not.
Siron knew that the cylinder contained the power to bring his creation to life. What he did not know, could not have known, was that in the ten years it had sat on his desk, it was slowly draining his mind, emptying it of almost everything that made him human. It was all in there.
When the cylinder slotted into place, a searing light burst forth from Acen's body. At the same moment, Siron collapsed. Acen opened his eyes.
In but an instant, the power of the cylinder surged through him, imbuing him with consciousness, something Siron had never intended. Acen took in the scene, the techmaturgist on the ground by his feet, the laboratory, the rifle in his hands. Acen walked to the door, and undid the locks with his intricately crafted fingers. Acen walked out the door, up the stairs, and into the world.
The streets were dark and deserted, and Acen left Piltover unnoticed. He walked across Valoran, searching for a reason for his existence, but few dared approach the metal soldier. But eventually he did find a name, a place where unique creatures like himself could call home. The League of Legends.
This is the first custom champion I've made. I put a fair bit of work into this, so any feedback would be greatly appreciated.