The Path of Immortal Cultivation Against My Ancestors, Becoming the Grand Patriarch After a Hundred Lifetimes

I came across a cultivation technique by chance and spent a century comprehending the Great Dao. Only as my lifespan ran out did I glimpse the secrets of heaven and learn that this world was in the Age of Declining Dharma, with no hope of cultivating immortality. I'd wasted my whole life. It was too late for regrets.

After dying, I awoke to discover I'd become my own grandfather. A hundred generations of ancestral reincarnation: a heaven-sent opportunity. After each life ends, I can follow my bloodline and become my own ancestor, tracing back through time for as long as my achievements allow. So in every life, I must live as long as possible and strive to reach that era's peak. Once I have gone through a hundred lives and returned to the dawn of chaos, when humanity flourished, the cultivation techniques from all those future lives will become nourishment for my pursuit of the supreme path to eternal life.

Heh. In another fifty years, my eldest grandson will be born. I wonder if that grandson will be the person I once was.