what is the rainbow body of djogchen buddhism?is it kundalini activation or is it related?how does one activate it?have any one of you guys tried to master this phenomenon?any ideas ?

it is also called light body and body of bliss in kriya yoga as I know but no ideas to activate it.chanting aum say some can activate it but dont know anything about it.


https://en.wikipedia.org/wiki/Rainbow_body

https://en.wikipedia.org/wiki/Sambhogak%C4%81ya