You can't use these in tags that you will be distributing to others without buying a license.
The reason for that is that wherever they're used without a license, you need to display credit to my website, ObsidianDawn.com. You can't very well ask the people you distribute them to to credit me everywhere. You could put credit ON the tag itself, if possible. Otherwise, you'd need a license. You can read about them here:
www.obsidiandawn.com/commercia…You can of course change the color of them, as Photoshop brushes, that's kinda what they're made for.