If you happen to dream a lot of darkness then you will probably dream of other kinds of dark things as well. There are a lot of symbols that can show up, but if you see dark magic then the entire dream meaning can be changed from the meaning of any other simple magic. This is because of the fear and foreboding associated with dark magic. It is not to be trifled with.
If you dream that someone is using dark magic then this might frighten you at first but as it turns out you should still be able to feel okay about it. Often times even though many people are warned of the evils behind dark magic and what it can bring, many of the spells are used to help people or to make life easier for certain people. If you have a dream in which someone is using dark magic or you are using dark magic then this might be a good sign or a sign that good things are going to happen because of all of the positives that come from the black magic.
Dark magic is also the kind that you should always be careful of. This is the kind of magic that the main character is always told to stay away from when it comes to horror movies and fantasies. Thus, if you dream that you are dabbling in dark magic, this kind of dream means there is something that you need to stay away from. There is something that you are doing which is causing you great strife and is going to put you on a negative road. Stop now before it's too late.