Okay, first, it's copyRIGHT, not copywrite. This is a clue. Someone has a right to the material. That someone is the writer, the author.
Second, go to the U.S. Copyright Office's site and READ about copyright.
People often get very confused about this. Let me try to explain.
You cannot copyright ideas. You can copyright your specific expression of your ideas. The words you used in exactly the way you used them to express your ideas is what's copyrightable.
Harry Potter uses lore from many, many sources. Rowling had no problem publishing. That's because she took the ideas (which can't be copyrighted) and expressed them uniquely (which can be copyrighted). You could, for instance, write a story about a teacher who happens to be a werewolf, so long as you don't copy Rowling's unique expression of the idea.
Read the Copyright Office's FAQ to get more information.