MTL - Transmigrated as the Ex-Wife of a Heroic Man - Chapter 69 why?

Rebecca imagined many things after finishing university; dying was not among them.Being reborn as the twin Sister to a different worlds Hero, and dealing by default with his opponents certainly wasn't what she imagined either.English is not my first language, so there will be mistakes. I will try to avoid them but make no promises.----The world this story is playing in, and the characters that are in the original story all belong to Tang Jia San Shao.

The man forsaken by the world, the man a slave to money and the man known as the legendary God of War in the highly popular MMORPG Continent of Magic. With the coming of age, he decides to say goodbye, but the feeble attempt to earn a little something for his time and effort ripples into an effect none could ever have imagined.

Throughout this current life of mine, I will pay no attention to my past lives, nor will I seek future lives. I wish to live vigorously, to pay back debt of gratitude and fulfill duty to avenge, to defeat valiant heroes from all species, and to proudly laugh at all the Gods and Demons of the Six Path of Reincarnation!

- Description from Novelupdates

Ning Ruogong died to Zebras as he laid his hands on The Energy System, which reincarnated him to the Southern continent of the Planet Kumia.

How strong will he become after cultivating as an undying entity?