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A Cosmic Core! This was the gift that Chaos planned to give to all of his subordinates. With it, they would be able to gain new powers they had never been able to touch before, the power of the Cosmic Energy that only beings of incredible high levels are able to refine, but that Chaos was able to acquire in small quantities, but even small quantities of such power were enough for him to do several types of miracles with it, of all sorts!
According to what he learned, Cosmic Energy could only surge naturally from Cosmic Beasts who bathed themselves with the radiation of space, where cosmic energy flowed freely. However, weak beings below the Supreme Deity Rank are incapable of sustaining Cosmic Energy properly for some reason, and it often disperses, or it might even hurt the one trying to harbor it, therefore, producing it is even harder and something seen as impossible unless you increase your Existence Rank to Supreme Deities…
Check "The Protagnist's Sister Is Actually the Strongest"!