Hyperion Saga Definition
refers to the parasitic organisms
created by the Core
collective) to harness human minds
for processing power
The cruciform grew into the host body, its tendrils infiltrating all major nerve centers and ultimately the brain. It is impossible to remove surgically and could only be removed by consuming a small quantity of the blood of Aenae.
Its effect was to render the user immortal as the parasite would reconstruct the host in the event of its death. The process optimally requires a period of 3 days, but can be shortened, although this increases the risk of a faulty resurrection.
Reference: Dan Simmons Hyperion Fall of Hyperion Endymion Rise of Endymion scifi