First, take down the Sword Demon, then save Runeterra.

He shut himself off, forgot his name, and holed up in a cramped rented room, immersing himself in virtual games, until he finally died suddenly. Opening his eyes, he found himself transported to the familiar Runeterra, where he encountered a Darkin cursed sword, and thus he took the name Atto. "Give me power, and I'll make you die." From then on, Runeterra had one more figure carrying a cursed sword. (Respecting official settings, please do not read if you mind)...