So right now we know that YC will break and go full devil god, but what will be the reason of that. Sure, Jasmine was betrayed and we saw that he released the darkness energy but the blackening didnt happen yet. So my theory is that when Mars said YC will lose everything that he possibly can, he didnt mean everyone dear to him will die or dissapear(XQ, MX, SX, other wives, daughter…) but instead they will become disgusted with him and his darkness and that pain will be the cause of his blackening.
Blackening
I wish that would be the case and only BB will understand him at that time and stay by his side