The starry sky knows no limits; as long as one is high enough, anywhere can be called the Stellar Dome.
Compared to many life planets, this place lacks some of the essential conditions for survival, so many scholars of planets refer to it as a vacuum.
However, at the level of Su Lin and others, they can feel that the starry sky is not lacking in matter, energy, and laws,
it's just that extracting matter, energy, and laws in the dark star space is incredibly difficult.
Only Heavenly Realm Strong Persons can barely absorb a trace.
Even at Su Lin's level, it's a challenge to maintain their life state with the energy, matter, and laws absorbed from here, let alone supply the Heavenly Boundary Mark within them.
This is the fundamental reason why the starry sky is difficult to survive in.
Ancestral Species can only be considered quasi-starry sky troops; only at the Heavenly Boundary level can one truly embark on cosmic battles!
