In ordinary settings, saying this is unquestionable, but from an academic perspective, it's not rigorous.
Complete mutation is irreversible, but there are cases of Hunters rescued during the acute mutation phase.
Like Mr. Wang.
Jin Hongyi, during his emotional mutation, was like a War God. He used just half a minute to slaughter through the ranks of Fungus Puppets — those highly corrosive filaments and spores landed on his body and were instantly burned to ash... Not only the bone blades, but it seemed his entire body was engulfed in flames invisible to the naked eye.
"I detected from afar using an optical thermometer," Candle Dragon said, "The temperature of Jin Hongyi's body surface is over six hundred degrees Celsius now, and at the 'eye structure openings' on his chest, abdomen, and back, it rises to around one thousand degrees; the tears of blood flowing on his body have a higher temperature than his skin."
