It need not be said that once the wilderness reclamation was successful, it could immediately become another fertile ground for the human race. If mortals were to proliferate in large numbers, it might even become the one hundredth 'territory' of the Earth Immortal Realm's human race. The cultivators who took part in the initial reclamation would gain vast opportunities, making breakthroughs in succession, eventually establishing sects like the Star Sect, which could exert its influence for tens of thousands of years, thrilling all directions, and even be recorded in history.
After all, the human race initially took up only a corner of the Earth Immortal Realm.
The expansion to the current 99 territories was clearly achieved through opening up new lands!
Or rather... by plundering lands from alien races!
There were quite a few alien races in the Earth Immortal Realm, but they were continuously being exterminated.