My Monster Fuses Everything
Apocalypse befell, and roommates performed a skyward ritual. As the fog descended, the Book of Blood Spirit appeared in the hands of all survivors, and only those with a Contract monster could survive. Su Han directed his gaze to the neighbor who had already mutated and twisted, silently pulling out a gleaming fruit knife... Grotesque meat corpses, giant spiders with gaping mouths, eyeballs enveloping the city, one-eyed sharp-toothed hand monsters... Civilization fell, cities shattered, and all humans became meat for the monsters. There was only one way to survive: Use monsters to fight monsters.
Chapter 306 Lizardman Sculpture_2
One part was enhanced with spiritual energy, but there were no significant mutations, while another part manifested some degree of alienation, or instability in the mental state.
All these samples were present; even the research institution had gathered information from some survivors who claimed that eating those monsters didn't cause much trouble, the impact being extremely minor, not a big issue unless consumed over a long term.
But for the Tree Domain, this was unnecessary, and they would probably not make it public.
One reason was the abundance of resources; the other was the fear of creating madmen.
Not madmen born from spiritual energy contamination, but those who turned psychopathic from consuming humanoid monsters.