Kaos Immortal

Kaos, the strongest being in all the three realms was sealed by the gods in Tartarus for eons. All he could do was observe the outside world, biding his time. He finally devised a means to escape his prison, only to escape and reincarnate in the body of a fledgling mage.
"Isn't it just to get stronger? How hard can that be? I will grow strong enough to crush all the gods in a single blow, and I will get my revenge. " Eindgard swears.