Anonymous asked: With a character that is a witch. I’m not sure how to write her power/magic. What limits or weakness can I put on it?
How to Create a Magic System for Your Book in 6 Steps
How to Create a Believable Magic System
Types of Magic (.pdf)
Which Witchcraft: Choosing a Magic System for Your Fantasy
You can also look up witch tropes and popular witch characters to help you get a good idea of what is commonly done. :)