Later worked out the doctrine of celestial Buddhas of the five countries
, which are reached in the highest meditation sessions. All of this has changed and expanded the mythology of the Buddha, yet the early legends of Sakyamuni are preserved in these ritual-contemplative complexes as sub-terrestrial history of the manifested body (Nirmala-kaya) of the Buddha, in which it is an illusion descends into the lower regions of the universe. Scripture Diamond Chariots (Vajrayana) supplemented these doctrines idea of the primordial Buddha (Adibuddha) - a mythological image of a single being, as well as the idea of an instant, like a thunderbolt (vajra), enlightenment, after which an adept becomes a Buddha, and which may reach in this life with using certain practices and tools (upayya).