The Basil Kingdom was based mostly on a tier 9 planet that once had a name but now it was simply called the Basil Kingdom. Being a tier 9 planet, the sun attached to this planet was much stronger than other ordinary suns, in fact there was a way to harness the power of a star to increase one's cultivation but there were prerequisites that needed to be done first like making the star safe to be consumed. Anyway, the star of the Basil Kingdom was a huge ball of red fire that would destroy anyone in the Basil Kingdom that wasn't above the 5th tier in cultivation. Of course, there were work arounds for this as there were many safety formations and runes that could be attached to houses or people respectively, but these were temporary solutions. One simply had to reach the 6th tier of cultivation to survive in the sun.