Outside of the Great Universe, there are Three Thousand Yanfu, but the number "Three Thousand" is not a fixed number, it's ever-changing as plane worlds constantly emerge and perish.
Let's not talk about newborn worlds.
Those worlds that are decayed, destroyed, or swallowed by the Nether Sea, except for those that have completely vanished, almost all "sink" into the abyss known as the Burial Sea.
Even if a plane world is engulfed by the Nether Sea, it often leaves behind "remnants."
For example, the Houtu Universe, which was as renowned as the Emperor Heaven Universe in the past, was completely obliterated under the invasion of the Nether Sea, yet some fragments have sunken to the bottom of the Burial Sea.
This place is referred to as "Two No-Control," meaning the River of Time and the River of Destiny do not pass through here.
Anything that falls here becomes eternally frozen.
Even the Nether Sea discards this place like an old shoe.
