Witches are definitely real as is the spirit world
This was brought to my attention as a young Christian. I was taking a speed-reading course at Sir George Williams University. During one of the lessons, as I was speed reading an article on voodoo, the Holy Spirit said to me, "Your teacher is a witch." I looked up at her; she appeared normal, looked to be in her late forties, had a British accent. Nothing abnormal at all.
I couldn't ask her directly in or out of class. But I raised my hand anyway and I told her I was speed-reading an article on voodoo and asked if voodoo had anything do do with witchcraft.
Her response was, "No it doesn't, and I should know because I am a witch!". I immediately pointed my finger at her rather accusitively and declared "I thought you were! There was a gasp as the entire class turned to look at me.
At that point, the teacher, trying to justify what she was, asked me if I thought she was a bad person. I meekly responded that the Bible says there is none good, no not one. She explained that she was a white witch and only cast good spells and asked if I thought she personally was evil. I said the Bible says that the heart is evil and wicked above all things, who can know it?"
Fortunately, she stopped questioning me further, because I had just about run out of human depravity verses.