Nigredo

[Paul Ferguson]

"The term was used by many alchemists to describe the initial, dark phase of the alchemical process, and it was later popularized by the psychoanalyst Carl Jung. It is the stage where old beliefs, habits, and aspects of the self begin to dissolve. During this period, you may experience feelings of disorientation, heaviness, or fear, but these experiences are an essential part of the process."

https://themindsjournal.com/going-throug...emy-phase/