The 13 regions of Runeterra, and how many there really are
Riot's own pages give three different counts: ten, twelve or thirteen regions. Which is right, why the others exist, and what each region holds.
Section
Lore
The rules the world runs on. Magic, the Void, the pantheons, the wars that keep being referenced and never shown.
Riot MMO playable races: who is in, and why the Darkin are out
Humans and Yordles are near-certain in Riot's Runeterra MMO, Vastaya likely. Everything else people ask about is a transformation, not a species, which settles it.
Where to start with Runeterra, from zero
Thirteen regions, a thousand years of history, two seasons of Arcane. One reading order that will not lose you, built for people waiting on Riot's MMO.
What is Runeterra? The world of Riot's MMO, explained
Runeterra is the world of League of Legends, Arcane and Riot's unannounced MMO: thirteen regions, a spirit realm beside them, and a thousand years of history.