Three more months passed, and the Angel's Heart Isaac had transplanted was now fully fused with him. With all preparations complete, he began to replace his liver.
The liver Isaac was transplanting belonged to a Titan, a species that now exists only in the Void. They possessed eternal life and near-undying regenerative abilities. They were dedicated to maintaining peace and preventing worlds from falling to ruin—they were as righteous as they come.
Of course, because of their incredibly noble ideals, despite being immensely powerful, Titans were, without exception, dirt poor. The moment they got their hands on any money, they would invest all of it into rescuing endangered worlds instead of keeping a single coin for themselves.
Therefore, some Titans would often resort to selling parts of their own bodies to make ends meet. A Titan's Life Force is so incredibly potent that, forget a liver—they'd dare to sell off their heart or even their brain!
