Mana Cultivation Realms:

[S > A > B > C > D > E > F] - The Mortal realms, after this true Cultivation begins.

Epic Realm

Legendary Realm

Mythical Realm

Phantasmal Realm

Transcendent Realm

Saint Realm

Void Realm

Soul Realm

Domain Realm

World Realm

Star Forging Realm

Nebula Realm

Black Hole Realm

Galaxy Realm

Entity Realm

Sage Realm

Great Sage Realm

More Realms will be revealed as the story progresses.