After several minutes worth of throwing dirt on Fantasia, Alister knew that the time was riped and the attention of the powerhouses in the world was on him.
As long as he let the world powerhouses witness this, Alister could force out the descent of Fantasia. After all, it was true that even the long-lived ancient powerhouses in Fantasia hadn't witnessed the descent of Fantasia.
In other words, if not for the demon king authorities and hero authorities, they wouldn't have believed that Fantasia even existed.
So when Alister mentioned that Fantasia was real but she was an evil goddess who wanted to feed on the world and the souls of the living beings, the top powerhouses in the world were skeptical but were in a wait-and-see situation.
They had indeed thought that if not for Fantasia introducing the concept of heroes and Demon King in this world, then they wouldn't have to deal with the troublesome threat of the Demon King.