As is well known, the further one progresses along the path of cultivation, the more arduous it becomes. For the Duan Lingtian of the past, restricted by his innate spiritual roots and the cultivation environment, it would have been impossible to advance from the "early stage of the Human Saint Realm" to the "intermediate stage" in less than eight or ten years.
But now, with his innate spiritual roots further evolved and an excellent cultivation environment at his disposal, he only needed two years to achieve that same breakthrough.
"If my innate spiritual root were a 'green spiritual root,' my cultivation speed would be even faster... If it were a 'blue spiritual root,' I could break through from the early stage to the intermediate stage of the Human Saint Realm in just a few months in an environment like this!"
Chapter 1913