Arcane introduced viewers to the mysterious power of Hextech, but what is this and how can it be manipulated? The city of Piltover was radically changed over the course of Arcane season 1, largely as a result of the work of Jayce. A scientist hailing from House Talis, Jayce became fascinated by the potential power of magic – that is to say, the Arcane. He pressed on with his discoveries despite the reservations of Heimderdinger, and soon his “Hextech” had become the foundation of Piltover’s economy.