Each planet represents a world.
Among them are large worlds, and small worlds as well.
These worlds might be sufficiently ancient, even older than the Nine Domains World.
There are also worlds that are newborn and haven't developed yet, already occupied.
Not every world is qualified to be independent.
The reason the Nine Domains World can be sealed independently is because it is by itself a large world.
Unless invaded by a Giant World.
Otherwise, even if they are large worlds, they cannot break through it.
This is also the confidence of the Nine Domains World.
But a true Giant World is extremely rare.
In the currently known universe, there are only sixteen Giant Worlds.
You could say, among thousands of worlds, a Giant World is truly a rarity.
So the Nine Domains World has not been destroyed all these years.
But some other worlds are not as fortunate as the Nine Domains World.
The most famous among them is the Giant World.
It is a newborn world, just a small world.
