Harem

There are Three Strongest power in the Universe The Chaos, The Nihility and The Infinite.
    Two Ruler of the Gods and Devils hold the power of Nihility and Chaos.
    The God has the power of Nihility while the Devil holds the Chaos.
    The God couldn't defeat the mastery of Chaos from the Devil who was at the summit while he is only at the peak, The God sacrificed some of his lifespan to bought some time to create The Unrivaled System.
    Finally after millions of years the God created the Unrivaled System but he was still not confident in defeating the Devil because he believes only the holder of the Infinite can.
    In the end the God sees a wandering soul in the void of his Nihility and betted on him that he will hold the Infinite, The God gave the Unrivaled System to the soul and the Power of Nihility and sacrifice his life to buy sometime to make the soul get stronger.