Runeterra Prime is a term that refers to the primary universe of the League of Legends intellectual property. Most stories and characters originate from this universe and the wider community commonly refers to it as the "canon" lore.
Runeterra Prime currently consists of The Void and three realms of existence, Celestial ( Targon Prime is located here), Spirit ( Bandle City and Marus Omegnum are located here; The Death realm is also part of it, including Mitna Rachnun), and Physical (the planet of Runeterra is located here) realms. The Void is the unknowable nothingness outside of existence which interacts with it through the Watchers and Voidborn.
- While the Death realm is a part of the larger Spirit realm, it is its own distinct section. Mitna Rachnun is domain within the Death realm which he corrupted and twisted for his own dark purposes.
- All voice-overs, flavour text and card art from Legends of Runeterra is considered canon to this universe, or to hypothetical situations within it.