Kevin nodded; he had already guessed that when the vortex turned white, it meant the dungeon had been looted. As Axel said, no need to be a genius to figure it out. He then asked, "What about the others?"
Axel smiled and continued his explanation while eating his sandwiches, "The purple ones are extremely rare here; normally, they appear closer to the capital. According to the observations of the Academy of the capital, a purple vortex remains open for only 7 days. There are many more treasures inside and many more powerful monsters. It is recommended to go there with a minimum of 30 fighters of average strength.
