explanation

The mention of green and necrotic flesh that changed into feminine flesh was related to part of Saturn's transformation that made her a living zombie. She was initially going to turn into a smart male zombie, but Hizz altered the transformation, making him into a living female zombie before she even turned, allowing her to also be changed into a woman and undergo dramatic growth in a way that further improved her anatomy, making her strength 35x stronger than that of Barbarians or Vikings.

The transformed materials are part of the spell, which changes people and objects to help their mind and body conform to the new reality, and since Hizz wanted an extra special subordinate, he allowed her to retain her original mind, except for male-to-female perceptions.