The Undying Immortal System - Chapter 321 - 310 – Life 76, Age 72, Martial King Peak

... owever, since I was nowhere near ready to give up on this life, I didn't want to cultivate a technique with severe potential side effects. I needed to find some way to improve it with only my notes and observations of others to guide me.

This was a nearly impossible task. The only thing that even made it somewhat feasible was that I could use my analysis ability to check the effects of each change I made as I made them.

Re-examining the technique, I made note of a few specifics. ...