Jayce Talis has shown an outstanding talent for engineering since his youth. After a tragic incident in childhood, when he was saved by a magician, Jayce devoted his life to combining magic and technology. Together with Viktor, he discovered Hex-tech, a breakthrough that changed the whole world.

As the youngest member of the Piltover Council, Jayce found himself embroiled in violent political games. His idealism often clashed with harsh reality, especially after the tragic incident with Silko and Jinx. Having lost faith in the political system, he withdrew from the Council.

Because if touching unstable wild rune, Jayce was pulled into a spatial rift and fell into a parallel universe. There he discovered the abandoned ruins of Piltover and Zaun, which became extinct after an unknown catastrophe. As a result of the fight with the mechanical creature, his hammer broke his leg. He spent half a year living in isolation in a stone pit cave, struggling with pain, despair, and loneliness. This event profoundly changed him: he became less impulsive, more cautious, with a philosophical view of technology and its price.

After returning, Jayce no longer aspires to power. He focuses on preventing the recurrence of disasters.