(Note that in this story, eternal life is a right reserved for specific species/entities. Also, different species have different lifespan rules. The numbers listed below show human lifespans at every realm. They're also equivalent to the units of Spiritual Energy needed by Spiritual Masters to match Body Refiners at any given realm.
Ex: 100 units of Spiritual Energy equals first-level Blood Purification)
--First Step of Cultivation: Body Refinement--
Blood Purification (100)
Sacred Bones (200)
Congenital (300)
Path Seeker (500)
Dharma Body (1,000)
Perfected Warrior (3,000)
Six-Path Saint (10,000)
Ninefold Transcendence (30,000)
--Second Step of Cultivation: Martial Excellence--
Martial Spirit (100,000)
Martial Quintessence (360,000)
Martial Throne (1 million)
Martial Mandate (3 million)
Martial Emperor (6 million)
Martial Sage (36 million)
Martial Ancestor (1 billion)
Martial Overlord (66 billion)
--Third Step of Cultivation: Supremacy--
Plane Master (???)
Creation/Extinction Envoy (???)
Quasi-Supreme (???)
Firmament (???)
True Beginning Lord (???)
Absolute End Diktat (???)
Forced Expansion (???)
Boundless Emanation (???)