Working on my prior concept, I'm trying to see how this character (the Archivist/DeathDelver) would pan in the long run, and I'm seeing her eventually questing dfor immortality. Are there any feats and/or prestige classes that deal with extending the life span of the normal human?
EDIT: The more I think of this character, the more I see her following the path to become, well, Death. Or at least an acolyte of death. I see her adventuring career as her journey to grow closer to Death, to achieve that transcendance that makes her a chosen of Death. True Neutral in alignment, of course.