Excrement PUTREFACTIO Mutilation Impotence / Poison; Dragon King Blackness Innocent Coagulatio Slaying / Defeat Sacrifice
Edinger explicitly catalogues Excrement as a central symbol of the alchemical putrefactio-mortificatio stage, clustering it with blackness, poison, mutilation, and defeat as necessary conditions of the transformative opus.
, Anatomy of the Psyche: Alchemical Symbolism in Psychotherapy, 1985thesis