Don't underestimate the battle between the Mother Goddess and the avatar of the Lord of Blood Flesh, as it affected countless large and small worlds.
In fact, the Time-Space Sea Domain is extremely vast, with a single stretch of it being no smaller than a galaxy.
Thus, there are thousands of worlds housing intelligent lifeforms and civilizations.
Between worlds, there usually lies a distance unattainable in a lifetime for most Cultivators.
Moreover, the environment of the Time-Space Sea Domain itself is extremely complex and changing.
The various time-space vortexes and chaotic currents that are invisible from a distance without getting close,
often make the spatial distance difficult to gauge.
What appears to be a nearby space can, upon entering, turn out to be over a hundred times larger than it seemed.
Additionally, the worlds themselves are moving, capable of instant teleportation along sudden appearances of time-space torrents.