The 13 Greater Worlds are respectively: Xuanhuang Great World, Shichen World, Great Demon World, Myriad Demon Great World, Five Elements World, Zombie World, Magic World, Fate World, World of Cause and Effect, Yuan Wang world, Heaven World, Vast Great World, Death World.
These 13 Greater Worlds are among the top-ranked worlds out of the 3000 Greater Worlds, their strength rivaling even the Pangu Great World.
One can imagine how terrifying the catastrophe Pangu Great World faced back then was, while simultaneously facing the siege of 13 comparable opponents. The brutality and heroism of that disaster can't even be captured by words.
"Xuanhuang Great World and Shichen World are both Seven Dimensional Universes on par with our Pangu Great World. Xuanhuang Great World contains 48 complete Great Dao Laws, while Shichen World contains 45 complete Great Dao Laws.
