I found this earlier great post too, from HP Cobra, explaining the levels:
Due to a lot of corruption, destruction of spiritual knowledge by the enemy, and moral/psychological damage that has been deeply embed by the enemy to human beings [let alone psychic attacks to meditating individuals who make it anywhere] a lot of spiritual knowledge, and especially serious...
ancient-forums.com
"...Anyhow, to dispel some confusion in regards to the Magnum Opus, there is no "singular" Magnum Opus, in the sense that, the level of advancement down this path has broadly three levels. There are levels in between but the case is to explain this with easy understanding.
In Level 1 of the Magnum Opus, one can expect the following:
-A decent connection of the soul to the body
-Siddhis and Powers
-In regards to body and youth, slower [but still progressing] ageing.
-One will still physically die, but one will be more advanced in the union of body and soul.
-The soul at this level needs to be reincarnated to be re-instated into a body, so that it doesn't run out of energy.
-In regards to wisdom, a low but decent level may be present.
An example of this level: Gopi Krishna.
In Level 2 one can expect:
-A very good connection of soul and body
-More Siddhis and Powers [some of which can appear miraculous to others, such as extreme ESP, premonition etc]
-In regards to the body and youth, very graceful ageing. In the case where one grows "old", one will still have virility and capacity of a very young person. At this point, the body can be increasingly rejuvenated by the soul to a powerful degree.
-One may physically die, but one's astral body is "Completed", also called in Pagan Cultures as: "Rainbow Body, Diamond Body, Temple of the Sun, Eternal Body" and so forth.
-The soul does not necessitate instant or forced reincarnation, and can very well exist "individually". One can still reincarnate and rebuild to this level easily.
-At the far end of this level, one can be astrally "Immortal" or have attained "Second Life". One even if killed or they die physically due to old age, accident or other factor they maintain perfect existence and full faculty in the Astral Realm.
-On very far levels of attainment, reincarnation is not only not forced, but also possible to happen "At will".
Examples: Francis Bacon.
In Level 3 one can expect:
-An "almost total" connection of soul and body
-Extensive, or extreme Siddhis or Powers. [Miraculous powers]
-One may regularly age but one can stop ageing, and if achieved after one is of physical age, reversing their physical age is possible. Physical immortality long story short, or extensive capacity to keep the body alive and reverse the ageing clock. All of this is possible.
-Despite of if one will die, one will certainly exist in the "Rainbow Body". Destroying said individuals is closely to an impossibility as far as spiritual means go.
-Reincarnation can still occur, and in some cases of far advancement at will. There were Yogis in the East who instantly reincarnated themselves in another fetus, on will, or who can die at will.
-Extensive wisdom and knowledge of miraculous proportions.
-On the higher levels, manifestation or de-manifestation of the body may occur, and other "phenomenal" or "unbelievable" events.
Examples: Adolf Hitler, Hindu Legendary Yogis, Asclepius, some of our Gods like Asmodeus who finished the Magnum Opus when the Gods were present on Earth [many thousands of years ago] etc.
These will probably clear misinformation so further knowledge can be based on understanding these precepts. Of course there is not a necessity to see this in "Three Levels", one can also see this as a linear line towards advancing. However, I made this broad categorization to help in understanding the difference between these levels. As far as I can see, these levels can readily be seen for what they represent and as clear "Checkpoints" in the soul's way to the Great Work of the Philosophers."
-High Priest Hooded Cobra 666