Precisely. No conjuring creatures from other realms, no casting spells you don't know the counters to. Magical safety rules.
Then I am pleased to make your acquaintance, Miss McCullough.
I'm afraid not. I don't believe any of it. There may be more strange realms in existence alongside our own than we can imagine, some wonderful and others terrible. But there is only one England. Not many Englands stacked atop each other, or whatever nonsense it is the muggles hold to.
That was very sensible of you. I've been called a demon. It's rather ridiculous. Didn't your accidental magic cause trouble for you in childhood, though?