Isdis had just become a divine, and at that moment, every church in the entire empire was informed by their god. It was a huge moment, since as a divine of control, Isdis's dominion over the empire can threaten many of the lesser gods and obscure deities. Someone like Amaterasu cannot be overshadowed no matter what, but if Isdis and Mira weren't close, Mira's church would've been in grave danger.
But as if fate was mocking them, at the same moment Isdis became a divine, her little sister, the Divine of Gluttony, appeared once more in the mortal world. And unlike the calm notification everyone got about Isdis's ascension, they got an immediate harsh warning, even from Amaterasu.
All gods were to pull their believers out of Lucy's land, unless they want them to be devoured alive. Even Amaterasu had pulled all of her people out in the blink of an eye with her divine magic.
