Fang Zheng wasn't particularly interested in when these underground Old Mice appeared. It's like if a pack of hungry wolves showed up in a human dwelling; do you really care why they came? Do hungry wolves eat people?
Eat?
Then that's the end of it.
Just kill them.
Actually, Fang Zheng had a pretty good impression of vampires initially. The Old Archbishop, Sophie, and Alucard were all quite decent people.
But the vampires he encountered in this world really ruined his mood. As a God of Magical Girls, a God of Games, a God of Magic, a God of Lust... well, let's not mention the last one.
In short, as a Deity, Fang Zheng thought these things that he found displeasing...
Should just be exterminated entirely.
Keeping them would only cause trouble.
"Close your eyes."
Fang Zheng casually released a Protective Barrier for a few children, reminding them as he did so. And in the next instant, a brilliant light suddenly appeared from the top of the underground city.
