The first surprise was that the Fire Cloud Star Domain's Rank could be upgraded.
As long as the conditions were met, a Fourth Tier Fire Cloud Star Domain could be uplifted into a Fifth-tier Fire Cloud Star Domain.
Moreover, the frequent invasions of the alien races into the world were also for the purpose of upgrading the Star Domain.
Of course, they did not understand and were unaware if it was their innate instincts, or the influence of the Heaven and Earth Will on their subconscious that made them so actively invade the current world.
This was also related to the massive benefits.
The conditions for upgrading were complex.
But the most important and most difficult one to achieve was this: The current Star Domain must have at least Three Series of the Heaven and Earth Star Will to be able to upgrade into a Fifth-tier Star Domain.
At present, there were only two Series of the Heaven and Earth Star Will, namely, the Fire Series and the Wind Series.
