The next day, in the early morning, there were electromagnetic sounds coming from the longzu area. It was the staff near the challenge arena who tested the machines.

many witches were around the machine. Someone asked, "what's this? It's so loud!"

"the border protector can release an extremely powerful border, so that the challenge arena will not suffer any damage!"

"this is the latest research and development of our ancient dragon Academy of Sciences!"

there was a sense of pride on the faces of the staff.

"it's just a border. What's rare? I don't believe that there is an indestructible border. In the past, the border around the challenge arena...