The scene of Arthur stopping the massacre was on every television in the world. From the strongest guild who watched the calamity with interest to the gigantic palaces who wished for the fall of the Yalveran Union.
The race toward the next human evolution was a competition between every nation. Resources, power, safety, and glory were all sought by the awakeners of the world.
However, everyone could agree that Amelio was a significant threat to the world. It was safe to say he was the most dangerous calamity to ever arrive in their world, purely judging his stats. After all, the amount of destruction he brought in a single day was immense.
If Amelio were allowed to exist, then the world would live in fear. Therefore, while the kingdom of Yalen was facing calamity, the rest of the world prepared for the worst: its destruction.