According to the description from the System, devouring a prey while using the Nigh-Divine Adaptation skill would alter his biological framework to integrate viable traits. He had already experienced how the skill works.
He temporarily gained access to the Steel Oustification because of that.
Due to that, killing and devouring the two Godlings after that became a lot easier.
But there seemed to be something more.
Ever since his hunt, Rex felt that his stomach was always full.
It exactly felt like finishing a feast where he overate, which made him feel nauseous and sluggish.
He thought it had something to do with devouring Godlings that are rich with energy, far more than his body was accustomed to, but that doesn't seem to be the case. His fullness persisted like his stomach had given up digesting it.
Rex had meditated and activated the Nigh-Divine Adaptation skill to find the cause.
