System Enhance

As the transformation unfolded, he felt his muscles melting away and his bones undergoing intense reconstruction, as if he were being ground down in real time. 

With each passing moment, his insides were vanishing in real time, every fiber of his being unraveling and dissolving into nothingness. 

"FUCK!!!!!!!!!!" The agony became unbearable, prompting him to scream in anguish, his bones contorting under the intense pressure of the transformation.

[System discovered that the Skull-Fiend body has numerous limitations for the Ultimate Mutation System.] 

[Enhancing race compatibility with the Ultimate Mutation System.]

[Enhancement Complete] 

Suddenly, another sensation overtook him as his insides began to reform, along with his muscles.

However, it felt different from the real thing. When he looked down, he noticed that these new organs were made of some kind of blue energy, mimicking real organs.