Soul Core : repairs, the lower dantian, as in rebuilding that center with the fragments of the soul that have been broken or drained through unhealthy attachments or cords, like puts the pieces together, recollects the soul pieces that have been leaked through that center and seals it to make it grow stronger so the life force that resides there is not leaked anymore.
Song of the Core: i am just getting familiar with it since its been around a week that i got it, on the same center (lower dantian) feels like a force that enables or pushes you to start blooming, freedom to be, to create, to build, to believe in you.
a Minor BluePrint of Power : this is like recreating (inside of you) the growth of thick strong trees, where the force comes from within the Earth and goes through the roots and expands while crusing its way up, then it feels like it explodes hard in the plexus and from there it expands its branches, like if the plexus was the core of the Earth replicated in you In that sense it feels building us like a strong fully nurtured tree with a force that is constantly supplied by the very center of the Earth.
The Golden Elixir : this is like cultivating a gold base in the lower dantian to be transmuted or to create the alchemy as the m state gold
Disclaimer: my opinion, how i understand them and how they have felt to me.
Would love to hear @Maoshan_Wanderer opinion :)
Edit: soul Core feels more in the Plexus not the lower Dantian or it could be both