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Such opportunities are invariably related to time, and the Ancient God Ancestor knew quite a few of them, like "Eternal Dream," "Land Beyond," and so on.
By utilizing exaggerated time flow rates, one achieves a leap in personal strength in a short period of time.
This kind of method is not a secret among the Ninth Rank and Eleventh Rank circles in the Cosmic Starry Skies; even more so for the peak clans. Otherwise, why would human civilization, which has only emerged from its home planet for just over two million years, have produced so many terrifying powerhouses?
Over two million years is merely the time flow rate of the Main Universe; as for those Eleventh Rank powerhouses of human civilization, how many years they have actually experienced is another matter.
But no matter how much time flow rate one experiences, some things cannot be achieved just by having enough time.