Board Thread:Questions and Answers/@comment-5647122-20140925003354

So far, we know that most magic falls into either idol magic or infection magic. We know that idol magic works by linking two objects, causing them to affect each other. Infection magic, on the other hand, we know very little. Just that it requries a piece of the object you wish to harm. I have a theory: infection magic works on the principle that the object and it's removed piece are still one in the same, thus, if you have one, you can affect the other. 