Following the invasion by the Onyx Empire and their seizure of the Earth Hill Spiritual Metal Mines that had only been protected by a few Domain Lord Realm Experts, the rest of the surrounding empires wasted no time in following in their footsteps. Each of them invading the Sky Empire from different directions as they seized different important resources close to their borders that they had been eyeing for a long time.
Still, none of them dared to move further inside the Sky Empire. Not wanting to be the first who ended up having to fight with the Soul Ascension Realm Experts hiding away inside the capital city of the Sky Empire.
After all, even if the strongest among these Soul Ascension Realm Experts had reached the Second Tribulation of the Soul Ascension Realm and had no way to compare to the peak experts of these empires who had at least reached the Fourth Tribulation of the Soul Ascension Realm, they still had more than enough numbers to make up for this.