I'm not used to seeing the expression "there exists" as opposed to "there is/are", is it a common expression? What is the difference between "there exist" and "there is/are"?

Native speaker’s answer
Rebecca
I am unsure about British English, but we don't usually say "there exists" in American English. We usually say, "there is/are." I believe "there exists" here is referencing a specific place where the witch's flowers are located. It's not a common expression in American English, but it may be common in British English.