This is the original text:
Drifters of this world are the collectors of forgotten knowledge, lost technologies and broken histories. Our Drifter is haunted by an insatiable illness, traveling further into the lands of Buried Time, hoping to discover a way to quiet the vicious disease.
This is my translation, and I am unsure about the second sentence:
I looked up "insatiable" on google translate and it gave me "永不满足", which I think means "impossible to satisfy" but I'm not sure if it fits. Based on my knowledge it sounds like something specific to eating food.
After digging around for some synonyms, I stumbled upon "贪得无厌" which google translate also says means "insatiable", which seems closer to "relentless greed", but I'm also not sure if this is the best choice.